]> git.ipfire.org Git - thirdparty/Python/cpython.git/commitdiff
gh-135953: Add flamegraph reporter to sampling profiler (#138715)
authorLászló Kiss Kollár <kiss.kollar.laszlo@gmail.com>
Tue, 9 Sep 2025 22:06:45 +0000 (23:06 +0100)
committerGitHub <noreply@github.com>
Tue, 9 Sep 2025 22:06:45 +0000 (23:06 +0100)
14 files changed:
.gitattributes
Doc/license.rst
Lib/profiling/sampling/_assets/python-logo-only.png [new file with mode: 0644]
Lib/profiling/sampling/_vendor/d3-flame-graph/4.1.3/d3-flamegraph-tooltip.min.js [new file with mode: 0644]
Lib/profiling/sampling/_vendor/d3-flame-graph/4.1.3/d3-flamegraph.css [new file with mode: 0644]
Lib/profiling/sampling/_vendor/d3-flame-graph/4.1.3/d3-flamegraph.min.js [new file with mode: 0644]
Lib/profiling/sampling/_vendor/d3/7.8.5/d3.min.js [new file with mode: 0644]
Lib/profiling/sampling/flamegraph.css [new file with mode: 0644]
Lib/profiling/sampling/flamegraph.js [new file with mode: 0644]
Lib/profiling/sampling/flamegraph_template.html [new file with mode: 0644]
Lib/profiling/sampling/sample.py
Lib/profiling/sampling/stack_collector.py
Lib/test/test_profiling/test_sampling_profiler.py
Makefile.pre.in

index 5682b9150a36e2d468e1c79f43117478bfcbaf99..823e3e975a23a8d78d7763083ae6949a96c90ead 100644 (file)
@@ -103,3 +103,4 @@ Python/stdlib_module_names.h                        generated
 Tools/peg_generator/pegen/grammar_parser.py         generated
 aclocal.m4                                          generated
 configure                                           generated
+*.min.js                                            generated
index 480414bb84c4f294a4feddf704692494eb251eb0..269d14cefbcefa0f7bf6846cb90f8e7903de8ce4 100644 (file)
@@ -1169,3 +1169,33 @@ contributors. The pyzstd code is distributed under the 3-Clause BSD License::
   CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
   OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+Profiling module
+----------------
+
+The :mod:`!profiling` module includes vendored third-party libraries in
+:file:`Lib/profiling/sampling/_vendor/` with the following licenses:
+
+**d3-flamegraph**
+
+The d3-flamegraph library is distributed under the Apache License, Version 2.0.
+See the OpenSSL section above for the full text of the Apache License Version 2.0.
+
+**d3.js**
+
+The d3.js library contains the following notice::
+
+  Copyright 2010-2021 Mike Bostock
+
+  Permission to use, copy, modify, and/or distribute this software for any purpose
+  with or without fee is hereby granted, provided that the above copyright notice
+  and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+  REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+  FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+  INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
+  OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+  TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
+  THIS SOFTWARE.
diff --git a/Lib/profiling/sampling/_assets/python-logo-only.png b/Lib/profiling/sampling/_assets/python-logo-only.png
new file mode 100644 (file)
index 0000000..20f36f4
Binary files /dev/null and b/Lib/profiling/sampling/_assets/python-logo-only.png differ
diff --git a/Lib/profiling/sampling/_vendor/d3-flame-graph/4.1.3/d3-flamegraph-tooltip.min.js b/Lib/profiling/sampling/_vendor/d3-flame-graph/4.1.3/d3-flamegraph-tooltip.min.js
new file mode 100644 (file)
index 0000000..7468437
--- /dev/null
@@ -0,0 +1 @@
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diff --git a/Lib/profiling/sampling/_vendor/d3-flame-graph/4.1.3/d3-flamegraph.css b/Lib/profiling/sampling/_vendor/d3-flame-graph/4.1.3/d3-flamegraph.css
new file mode 100644 (file)
index 0000000..fa6f345
--- /dev/null
@@ -0,0 +1,46 @@
+.d3-flame-graph rect {
+  stroke: #EEEEEE;
+  fill-opacity: .8;
+}
+
+.d3-flame-graph rect:hover {
+  stroke: #474747;
+  stroke-width: 0.5;
+  cursor: pointer;
+}
+
+.d3-flame-graph-label {
+  pointer-events: none;
+  white-space: nowrap;
+  text-overflow: ellipsis;
+  overflow: hidden;
+  font-size: 12px;
+  font-family: Verdana;
+  margin-left: 4px;
+  margin-right: 4px;
+  line-height: 1.5;
+  padding: 0 0 0;
+  font-weight: 400;
+  color: black;
+  text-align: left;
+}
+
+.d3-flame-graph .fade {
+  opacity: 0.6 !important;
+}
+
+.d3-flame-graph .title {
+  font-size: 20px;
+  font-family: Verdana;
+}
+
+.d3-flame-graph-tip {
+    background-color: black;
+    border: none;
+    border-radius: 3px;
+    padding: 5px 10px 5px 10px;
+    min-width: 250px;
+    text-align: left;
+    color: white;
+    z-index: 10;
+}
\ No newline at end of file
diff --git a/Lib/profiling/sampling/_vendor/d3-flame-graph/4.1.3/d3-flamegraph.min.js b/Lib/profiling/sampling/_vendor/d3-flame-graph/4.1.3/d3-flamegraph.min.js
new file mode 100644 (file)
index 0000000..3b8d825
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new file mode 100644 (file)
index 0000000..8d56002
--- /dev/null
@@ -0,0 +1,2 @@
+// https://d3js.org v7.8.5 Copyright 2010-2023 Mike Bostock
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32,vu=11093356479670487e-47,_u=gu(4),bu=gu(8),mu=gu(12),xu=gu(16),wu=gu(4);function Mu(t,n,e,r,i,o){const a=(n-o)*(e-i),u=(t-i)*(r-o),c=a-u,f=Math.abs(a+u);return Math.abs(c)>=33306690738754716e-32*f?c:-function(t,n,e,r,i,o,a){let u,c,f,s,l,h,d,p,g,y,v,_,b,m,x,w,M,T;const A=t-i,S=e-i,E=n-o,N=r-o;m=A*N,h=hu*A,d=h-(h-A),p=A-d,h=hu*N,g=h-(h-N),y=N-g,x=p*y-(m-d*g-p*g-d*y),w=E*S,h=hu*E,d=h-(h-E),p=E-d,h=hu*S,g=h-(h-S),y=S-g,M=p*y-(w-d*g-p*g-d*y),v=x-M,l=x-v,_u[0]=x-(v+l)+(l-M),_=m+v,l=_-m,b=m-(_-l)+(v-l),v=b-w,l=b-v,_u[1]=b-(v+l)+(l-w),T=_+v,l=T-_,_u[2]=_-(T-l)+(v-l),_u[3]=T;let k=function(t,n){let e=n[0];for(let r=1;r<t;r++)e+=n[r];return e}(4,_u),C=yu*a;if(k>=C||-k>=C)return k;if(l=t-A,u=t-(A+l)+(l-i),l=e-S,f=e-(S+l)+(l-i),l=n-E,c=n-(E+l)+(l-o),l=r-N,s=r-(N+l)+(l-o),0===u&&0===c&&0===f&&0===s)return k;if(C=vu*a+du*Math.abs(k),k+=A*s+N*u-(E*f+S*c),k>=C||-k>=C)return k;m=u*N,h=hu*u,d=h-(h-u),p=u-d,h=hu*N,g=h-(h-N),y=N-g,x=p*y-(m-d*g-p*g-d*y),w=c*S,h=hu*c,d=h-(h-c),p=c-d,h=hu*S,g=h-(h-S),y=S-g,M=p*y-(w-d*g-p*g-d*y),v=x-M,l=x-v,wu[0]=x-(v+l)+(l-M),_=m+v,l=_-m,b=m-(_-l)+(v-l),v=b-w,l=b-v,wu[1]=b-(v+l)+(l-w),T=_+v,l=T-_,wu[2]=_-(T-l)+(v-l),wu[3]=T;const P=pu(4,_u,4,wu,bu);m=A*s,h=hu*A,d=h-(h-A),p=A-d,h=hu*s,g=h-(h-s),y=s-g,x=p*y-(m-d*g-p*g-d*y),w=E*f,h=hu*E,d=h-(h-E),p=E-d,h=hu*f,g=h-(h-f),y=f-g,M=p*y-(w-d*g-p*g-d*y),v=x-M,l=x-v,wu[0]=x-(v+l)+(l-M),_=m+v,l=_-m,b=m-(_-l)+(v-l),v=b-w,l=b-v,wu[1]=b-(v+l)+(l-w),T=_+v,l=T-_,wu[2]=_-(T-l)+(v-l),wu[3]=T;const z=pu(P,bu,4,wu,mu);m=u*s,h=hu*u,d=h-(h-u),p=u-d,h=hu*s,g=h-(h-s),y=s-g,x=p*y-(m-d*g-p*g-d*y),w=c*f,h=hu*c,d=h-(h-c),p=c-d,h=hu*f,g=h-(h-f),y=f-g,M=p*y-(w-d*g-p*g-d*y),v=x-M,l=x-v,wu[0]=x-(v+l)+(l-M),_=m+v,l=_-m,b=m-(_-l)+(v-l),v=b-w,l=b-v,wu[1]=b-(v+l)+(l-w),T=_+v,l=T-_,wu[2]=_-(T-l)+(v-l),wu[3]=T;const $=pu(z,mu,4,wu,xu);return xu[$-1]}(t,n,e,r,i,o,f)}const Tu=Math.pow(2,-52),Au=new Uint32Array(512);class Su{static from(t,n=zu,e=$u){const r=t.length,i=new Float64Array(2*r);for(let o=0;o<r;o++){const r=t[o];i[2*o]=n(r),i[2*o+1]=e(r)}return new Su(i)}constructor(t){const n=t.length>>1;if(n>0&&"number"!=typeof t[0])throw new Error("Expected coords to contain numbers.");this.coords=t;const e=Math.max(2*n-5,0);this._triangles=new Uint32Array(3*e),this._halfedges=new Int32Array(3*e),this._hashSize=Math.ceil(Math.sqrt(n)),this._hullPrev=new Uint32Array(n),this._hullNext=new Uint32Array(n),this._hullTri=new Uint32Array(n),this._hullHash=new Int32Array(this._hashSize).fill(-1),this._ids=new Uint32Array(n),this._dists=new Float64Array(n),this.update()}update(){const{coords:t,_hullPrev:n,_hullNext:e,_hullTri:r,_hullHash:i}=this,o=t.length>>1;let a=1/0,u=1/0,c=-1/0,f=-1/0;for(let n=0;n<o;n++){const e=t[2*n],r=t[2*n+1];e<a&&(a=e),r<u&&(u=r),e>c&&(c=e),r>f&&(f=r),this._ids[n]=n}const s=(a+c)/2,l=(u+f)/2;let h,d,p,g=1/0;for(let n=0;n<o;n++){const e=Eu(s,l,t[2*n],t[2*n+1]);e<g&&(h=n,g=e)}const y=t[2*h],v=t[2*h+1];g=1/0;for(let n=0;n<o;n++){if(n===h)continue;const e=Eu(y,v,t[2*n],t[2*n+1]);e<g&&e>0&&(d=n,g=e)}let _=t[2*d],b=t[2*d+1],m=1/0;for(let n=0;n<o;n++){if(n===h||n===d)continue;const e=ku(y,v,_,b,t[2*n],t[2*n+1]);e<m&&(p=n,m=e)}let x=t[2*p],w=t[2*p+1];if(m===1/0){for(let n=0;n<o;n++)this._dists[n]=t[2*n]-t[0]||t[2*n+1]-t[1];Cu(this._ids,this._dists,0,o-1);const n=new Uint32Array(o);let e=0;for(let t=0,r=-1/0;t<o;t++){const i=this._ids[t];this._dists[i]>r&&(n[e++]=i,r=this._dists[i])}return this.hull=n.subarray(0,e),this.triangles=new Uint32Array(0),void(this.halfedges=new Uint32Array(0))}if(Mu(y,v,_,b,x,w)<0){const t=d,n=_,e=b;d=p,_=x,b=w,p=t,x=n,w=e}const M=function(t,n,e,r,i,o){const a=e-t,u=r-n,c=i-t,f=o-n,s=a*a+u*u,l=c*c+f*f,h=.5/(a*f-u*c),d=t+(f*s-u*l)*h,p=n+(a*l-c*s)*h;return{x:d,y:p}}(y,v,_,b,x,w);this._cx=M.x,this._cy=M.y;for(let n=0;n<o;n++)this._dists[n]=Eu(t[2*n],t[2*n+1],M.x,M.y);Cu(this._ids,this._dists,0,o-1),this._hullStart=h;let T=3;e[h]=n[p]=d,e[d]=n[h]=p,e[p]=n[d]=h,r[h]=0,r[d]=1,r[p]=2,i.fill(-1),i[this._hashKey(y,v)]=h,i[this._hashKey(_,b)]=d,i[this._hashKey(x,w)]=p,this.trianglesLen=0,this._addTriangle(h,d,p,-1,-1,-1);for(let o,a,u=0;u<this._ids.length;u++){const c=this._ids[u],f=t[2*c],s=t[2*c+1];if(u>0&&Math.abs(f-o)<=Tu&&Math.abs(s-a)<=Tu)continue;if(o=f,a=s,c===h||c===d||c===p)continue;let l=0;for(let t=0,n=this._hashKey(f,s);t<this._hashSize&&(l=i[(n+t)%this._hashSize],-1===l||l===e[l]);t++);l=n[l];let g,y=l;for(;g=e[y],Mu(f,s,t[2*y],t[2*y+1],t[2*g],t[2*g+1])>=0;)if(y=g,y===l){y=-1;break}if(-1===y)continue;let v=this._addTriangle(y,c,e[y],-1,-1,r[y]);r[c]=this._legalize(v+2),r[y]=v,T++;let _=e[y];for(;g=e[_],Mu(f,s,t[2*_],t[2*_+1],t[2*g],t[2*g+1])<0;)v=this._addTriangle(_,c,g,r[c],-1,r[_]),r[c]=this._legalize(v+2),e[_]=_,T--,_=g;if(y===l)for(;g=n[y],Mu(f,s,t[2*g],t[2*g+1],t[2*y],t[2*y+1])<0;)v=this._addTriangle(g,c,y,-1,r[y],r[g]),this._legalize(v+2),r[g]=v,e[y]=y,T--,y=g;this._hullStart=n[c]=y,e[y]=n[_]=c,e[c]=_,i[this._hashKey(f,s)]=c,i[this._hashKey(t[2*y],t[2*y+1])]=y}this.hull=new Uint32Array(T);for(let t=0,n=this._hullStart;t<T;t++)this.hull[t]=n,n=e[n];this.triangles=this._triangles.subarray(0,this.trianglesLen),this.halfedges=this._halfedges.subarray(0,this.trianglesLen)}_hashKey(t,n){return Math.floor(function(t,n){const e=t/(Math.abs(t)+Math.abs(n));return(n>0?3-e:1+e)/4}(t-this._cx,n-this._cy)*this._hashSize)%this._hashSize}_legalize(t){const{_triangles:n,_halfedges:e,coords:r}=this;let i=0,o=0;for(;;){const a=e[t],u=t-t%3;if(o=u+(t+2)%3,-1===a){if(0===i)break;t=Au[--i];continue}const c=a-a%3,f=u+(t+1)%3,s=c+(a+2)%3,l=n[o],h=n[t],d=n[f],p=n[s];if(Nu(r[2*l],r[2*l+1],r[2*h],r[2*h+1],r[2*d],r[2*d+1],r[2*p],r[2*p+1])){n[t]=p,n[a]=l;const r=e[s];if(-1===r){let n=this._hullStart;do{if(this._hullTri[n]===s){this._hullTri[n]=t;break}n=this._hullPrev[n]}while(n!==this._hullStart)}this._link(t,r),this._link(a,e[o]),this._link(o,s);const u=c+(a+1)%3;i<Au.length&&(Au[i++]=u)}else{if(0===i)break;t=Au[--i]}}return o}_link(t,n){this._halfedges[t]=n,-1!==n&&(this._halfedges[n]=t)}_addTriangle(t,n,e,r,i,o){const a=this.trianglesLen;return this._triangles[a]=t,this._triangles[a+1]=n,this._triangles[a+2]=e,this._link(a,r),this._link(a+1,i),this._link(a+2,o),this.trianglesLen+=3,a}}function Eu(t,n,e,r){const i=t-e,o=n-r;return i*i+o*o}function Nu(t,n,e,r,i,o,a,u){const c=t-a,f=n-u,s=e-a,l=r-u,h=i-a,d=o-u,p=s*s+l*l,g=h*h+d*d;return c*(l*g-p*d)-f*(s*g-p*h)+(c*c+f*f)*(s*d-l*h)<0}function ku(t,n,e,r,i,o){const a=e-t,u=r-n,c=i-t,f=o-n,s=a*a+u*u,l=c*c+f*f,h=.5/(a*f-u*c),d=(f*s-u*l)*h,p=(a*l-c*s)*h;return d*d+p*p}function Cu(t,n,e,r){if(r-e<=20)for(let i=e+1;i<=r;i++){const r=t[i],o=n[r];let a=i-1;for(;a>=e&&n[t[a]]>o;)t[a+1]=t[a--];t[a+1]=r}else{let i=e+1,o=r;Pu(t,e+r>>1,i),n[t[e]]>n[t[r]]&&Pu(t,e,r),n[t[i]]>n[t[r]]&&Pu(t,i,r),n[t[e]]>n[t[i]]&&Pu(t,e,i);const a=t[i],u=n[a];for(;;){do{i++}while(n[t[i]]<u);do{o--}while(n[t[o]]>u);if(o<i)break;Pu(t,i,o)}t[e+1]=t[o],t[o]=a,r-i+1>=o-e?(Cu(t,n,i,r),Cu(t,n,e,o-1)):(Cu(t,n,e,o-1),Cu(t,n,i,r))}}function Pu(t,n,e){const r=t[n];t[n]=t[e],t[e]=r}function zu(t){return t[0]}function $u(t){return t[1]}const Du=1e-6;class Ru{constructor(){this._x0=this._y0=this._x1=this._y1=null,this._=""}moveTo(t,n){this._+=`M${this._x0=this._x1=+t},${this._y0=this._y1=+n}`}closePath(){null!==this._x1&&(this._x1=this._x0,this._y1=this._y0,this._+="Z")}lineTo(t,n){this._+=`L${this._x1=+t},${this._y1=+n}`}arc(t,n,e){const r=(t=+t)+(e=+e),i=n=+n;if(e<0)throw new Error("negative radius");null===this._x1?this._+=`M${r},${i}`:(Math.abs(this._x1-r)>Du||Math.abs(this._y1-i)>Du)&&(this._+="L"+r+","+i),e&&(this._+=`A${e},${e},0,1,1,${t-e},${n}A${e},${e},0,1,1,${this._x1=r},${this._y1=i}`)}rect(t,n,e,r){this._+=`M${this._x0=this._x1=+t},${this._y0=this._y1=+n}h${+e}v${+r}h${-e}Z`}value(){return this._||null}}class Fu{constructor(){this._=[]}moveTo(t,n){this._.push([t,n])}closePath(){this._.push(this._[0].slice())}lineTo(t,n){this._.push([t,n])}value(){return this._.length?this._:null}}class qu{constructor(t,[n,e,r,i]=[0,0,960,500]){if(!((r=+r)>=(n=+n)&&(i=+i)>=(e=+e)))throw new Error("invalid bounds");this.delaunay=t,this._circumcenters=new Float64Array(2*t.points.length),this.vectors=new Float64Array(2*t.points.length),this.xmax=r,this.xmin=n,this.ymax=i,this.ymin=e,this._init()}update(){return this.delaunay.update(),this._init(),this}_init(){const{delaunay:{points:t,hull:n,triangles:e},vectors:r}=this;let i,o;const a=this.circumcenters=this._circumcenters.subarray(0,e.length/3*2);for(let r,u,c=0,f=0,s=e.length;c<s;c+=3,f+=2){const s=2*e[c],l=2*e[c+1],h=2*e[c+2],d=t[s],p=t[s+1],g=t[l],y=t[l+1],v=t[h],_=t[h+1],b=g-d,m=y-p,x=v-d,w=_-p,M=2*(b*w-m*x);if(Math.abs(M)<1e-9){if(void 0===i){i=o=0;for(const e of n)i+=t[2*e],o+=t[2*e+1];i/=n.length,o/=n.length}const e=1e9*Math.sign((i-d)*w-(o-p)*x);r=(d+v)/2-e*w,u=(p+_)/2+e*x}else{const t=1/M,n=b*b+m*m,e=x*x+w*w;r=d+(w*n-m*e)*t,u=p+(b*e-x*n)*t}a[f]=r,a[f+1]=u}let u,c,f,s=n[n.length-1],l=4*s,h=t[2*s],d=t[2*s+1];r.fill(0);for(let e=0;e<n.length;++e)s=n[e],u=l,c=h,f=d,l=4*s,h=t[2*s],d=t[2*s+1],r[u+2]=r[l]=f-d,r[u+3]=r[l+1]=h-c}render(t){const n=null==t?t=new Ru:void 0,{delaunay:{halfedges:e,inedges:r,hull:i},circumcenters:o,vectors:a}=this;if(i.length<=1)return null;for(let n=0,r=e.length;n<r;++n){const r=e[n];if(r<n)continue;const i=2*Math.floor(n/3),a=2*Math.floor(r/3),u=o[i],c=o[i+1],f=o[a],s=o[a+1];this._renderSegment(u,c,f,s,t)}let u,c=i[i.length-1];for(let n=0;n<i.length;++n){u=c,c=i[n];const e=2*Math.floor(r[c]/3),f=o[e],s=o[e+1],l=4*u,h=this._project(f,s,a[l+2],a[l+3]);h&&this._renderSegment(f,s,h[0],h[1],t)}return n&&n.value()}renderBounds(t){const n=null==t?t=new Ru:void 0;return t.rect(this.xmin,this.ymin,this.xmax-this.xmin,this.ymax-this.ymin),n&&n.value()}renderCell(t,n){const e=null==n?n=new Ru:void 0,r=this._clip(t);if(null===r||!r.length)return;n.moveTo(r[0],r[1]);let i=r.length;for(;r[0]===r[i-2]&&r[1]===r[i-1]&&i>1;)i-=2;for(let t=2;t<i;t+=2)r[t]===r[t-2]&&r[t+1]===r[t-1]||n.lineTo(r[t],r[t+1]);return n.closePath(),e&&e.value()}*cellPolygons(){const{delaunay:{points:t}}=this;for(let n=0,e=t.length/2;n<e;++n){const t=this.cellPolygon(n);t&&(t.index=n,yield t)}}cellPolygon(t){const n=new Fu;return this.renderCell(t,n),n.value()}_renderSegment(t,n,e,r,i){let o;const a=this._regioncode(t,n),u=this._regioncode(e,r);0===a&&0===u?(i.moveTo(t,n),i.lineTo(e,r)):(o=this._clipSegment(t,n,e,r,a,u))&&(i.moveTo(o[0],o[1]),i.lineTo(o[2],o[3]))}contains(t,n,e){return(n=+n)==n&&(e=+e)==e&&this.delaunay._step(t,n,e)===t}*neighbors(t){const n=this._clip(t);if(n)for(const e of this.delaunay.neighbors(t)){const t=this._clip(e);if(t)t:for(let r=0,i=n.length;r<i;r+=2)for(let o=0,a=t.length;o<a;o+=2)if(n[r]===t[o]&&n[r+1]===t[o+1]&&n[(r+2)%i]===t[(o+a-2)%a]&&n[(r+3)%i]===t[(o+a-1)%a]){yield e;break t}}}_cell(t){const{circumcenters:n,delaunay:{inedges:e,halfedges:r,triangles:i}}=this,o=e[t];if(-1===o)return null;const a=[];let u=o;do{const e=Math.floor(u/3);if(a.push(n[2*e],n[2*e+1]),u=u%3==2?u-2:u+1,i[u]!==t)break;u=r[u]}while(u!==o&&-1!==u);return a}_clip(t){if(0===t&&1===this.delaunay.hull.length)return[this.xmax,this.ymin,this.xmax,this.ymax,this.xmin,this.ymax,this.xmin,this.ymin];const n=this._cell(t);if(null===n)return null;const{vectors:e}=this,r=4*t;return this._simplify(e[r]||e[r+1]?this._clipInfinite(t,n,e[r],e[r+1],e[r+2],e[r+3]):this._clipFinite(t,n))}_clipFinite(t,n){const e=n.length;let r,i,o,a,u=null,c=n[e-2],f=n[e-1],s=this._regioncode(c,f),l=0;for(let h=0;h<e;h+=2)if(r=c,i=f,c=n[h],f=n[h+1],o=s,s=this._regioncode(c,f),0===o&&0===s)a=l,l=0,u?u.push(c,f):u=[c,f];else{let n,e,h,d,p;if(0===o){if(null===(n=this._clipSegment(r,i,c,f,o,s)))continue;[e,h,d,p]=n}else{if(null===(n=this._clipSegment(c,f,r,i,s,o)))continue;[d,p,e,h]=n,a=l,l=this._edgecode(e,h),a&&l&&this._edge(t,a,l,u,u.length),u?u.push(e,h):u=[e,h]}a=l,l=this._edgecode(d,p),a&&l&&this._edge(t,a,l,u,u.length),u?u.push(d,p):u=[d,p]}if(u)a=l,l=this._edgecode(u[0],u[1]),a&&l&&this._edge(t,a,l,u,u.length);else if(this.contains(t,(this.xmin+this.xmax)/2,(this.ymin+this.ymax)/2))return[this.xmax,this.ymin,this.xmax,this.ymax,this.xmin,this.ymax,this.xmin,this.ymin];return u}_clipSegment(t,n,e,r,i,o){const a=i<o;for(a&&([t,n,e,r,i,o]=[e,r,t,n,o,i]);;){if(0===i&&0===o)return a?[e,r,t,n]:[t,n,e,r];if(i&o)return null;let u,c,f=i||o;8&f?(u=t+(e-t)*(this.ymax-n)/(r-n),c=this.ymax):4&f?(u=t+(e-t)*(this.ymin-n)/(r-n),c=this.ymin):2&f?(c=n+(r-n)*(this.xmax-t)/(e-t),u=this.xmax):(c=n+(r-n)*(this.xmin-t)/(e-t),u=this.xmin),i?(t=u,n=c,i=this._regioncode(t,n)):(e=u,r=c,o=this._regioncode(e,r))}}_clipInfinite(t,n,e,r,i,o){let a,u=Array.from(n);if((a=this._project(u[0],u[1],e,r))&&u.unshift(a[0],a[1]),(a=this._project(u[u.length-2],u[u.length-1],i,o))&&u.push(a[0],a[1]),u=this._clipFinite(t,u))for(let n,e=0,r=u.length,i=this._edgecode(u[r-2],u[r-1]);e<r;e+=2)n=i,i=this._edgecode(u[e],u[e+1]),n&&i&&(e=this._edge(t,n,i,u,e),r=u.length);else this.contains(t,(this.xmin+this.xmax)/2,(this.ymin+this.ymax)/2)&&(u=[this.xmin,this.ymin,this.xmax,this.ymin,this.xmax,this.ymax,this.xmin,this.ymax]);return u}_edge(t,n,e,r,i){for(;n!==e;){let e,o;switch(n){case 5:n=4;continue;case 4:n=6,e=this.xmax,o=this.ymin;break;case 6:n=2;continue;case 2:n=10,e=this.xmax,o=this.ymax;break;case 10:n=8;continue;case 8:n=9,e=this.xmin,o=this.ymax;break;case 9:n=1;continue;case 1:n=5,e=this.xmin,o=this.ymin}r[i]===e&&r[i+1]===o||!this.contains(t,e,o)||(r.splice(i,0,e,o),i+=2)}return i}_project(t,n,e,r){let i,o,a,u=1/0;if(r<0){if(n<=this.ymin)return null;(i=(this.ymin-n)/r)<u&&(a=this.ymin,o=t+(u=i)*e)}else if(r>0){if(n>=this.ymax)return null;(i=(this.ymax-n)/r)<u&&(a=this.ymax,o=t+(u=i)*e)}if(e>0){if(t>=this.xmax)return null;(i=(this.xmax-t)/e)<u&&(o=this.xmax,a=n+(u=i)*r)}else if(e<0){if(t<=this.xmin)return null;(i=(this.xmin-t)/e)<u&&(o=this.xmin,a=n+(u=i)*r)}return[o,a]}_edgecode(t,n){return(t===this.xmin?1:t===this.xmax?2:0)|(n===this.ymin?4:n===this.ymax?8:0)}_regioncode(t,n){return(t<this.xmin?1:t>this.xmax?2:0)|(n<this.ymin?4:n>this.ymax?8:0)}_simplify(t){if(t&&t.length>4){for(let n=0;n<t.length;n+=2){const e=(n+2)%t.length,r=(n+4)%t.length;(t[n]===t[e]&&t[e]===t[r]||t[n+1]===t[e+1]&&t[e+1]===t[r+1])&&(t.splice(e,2),n-=2)}t.length||(t=null)}return t}}const Uu=2*Math.PI,Iu=Math.pow;function Ou(t){return t[0]}function Bu(t){return t[1]}function Yu(t,n,e){return[t+Math.sin(t+n)*e,n+Math.cos(t-n)*e]}class Lu{static from(t,n=Ou,e=Bu,r){return new Lu("length"in t?function(t,n,e,r){const i=t.length,o=new Float64Array(2*i);for(let a=0;a<i;++a){const i=t[a];o[2*a]=n.call(r,i,a,t),o[2*a+1]=e.call(r,i,a,t)}return o}(t,n,e,r):Float64Array.from(function*(t,n,e,r){let i=0;for(const o of t)yield n.call(r,o,i,t),yield e.call(r,o,i,t),++i}(t,n,e,r)))}constructor(t){this._delaunator=new Su(t),this.inedges=new Int32Array(t.length/2),this._hullIndex=new Int32Array(t.length/2),this.points=this._delaunator.coords,this._init()}update(){return this._delaunator.update(),this._init(),this}_init(){const t=this._delaunator,n=this.points;if(t.hull&&t.hull.length>2&&function(t){const{triangles:n,coords:e}=t;for(let t=0;t<n.length;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={draw(t,n){const e=.62625*wm(n);t.moveTo(0,-e),t.lineTo(e,0),t.lineTo(0,e),t.lineTo(-e,0),t.closePath()}},px={draw(t,n){const e=.87559*wm(n-mm(n/7,2));t.moveTo(-e,0),t.lineTo(e,0),t.moveTo(0,e),t.lineTo(0,-e)}},gx={draw(t,n){const e=wm(n),r=-e/2;t.rect(r,r,e,e)}},yx={draw(t,n){const e=.4431*wm(n);t.moveTo(e,e),t.lineTo(e,-e),t.lineTo(-e,-e),t.lineTo(-e,e),t.closePath()}};const vx=xm(Tm/10)/xm(7*Tm/10),_x=xm(Sm/10)*vx,bx=-_m(Sm/10)*vx;var mx={draw(t,n){const e=wm(.8908130915292852*n),r=_x*e,i=bx*e;t.moveTo(0,-e),t.lineTo(r,i);for(let n=1;n<5;++n){const o=Sm*n/5,a=_m(o),u=xm(o);t.lineTo(u*e,-a*e),t.lineTo(a*r-u*i,u*r+a*i)}t.closePath()}};const xx=wm(3);var wx={draw(t,n){const e=-wm(n/(3*xx));t.moveTo(0,2*e),t.lineTo(-xx*e,-e),t.lineTo(xx*e,-e),t.closePath()}};const Mx=wm(3);var Tx={draw(t,n){const e=.6824*wm(n),r=e/2,i=e*Mx/2;t.moveTo(0,-e),t.lineTo(i,r),t.lineTo(-i,r),t.closePath()}};const Ax=-.5,Sx=wm(3)/2,Ex=1/wm(12),Nx=3*(Ex/2+1);var kx={draw(t,n){const e=wm(n/Nx),r=e/2,i=e*Ex,o=r,a=e*Ex+e,u=-o,c=a;t.moveTo(r,i),t.lineTo(o,a),t.lineTo(u,c),t.lineTo(Ax*r-Sx*i,Sx*r+Ax*i),t.lineTo(Ax*o-Sx*a,Sx*o+Ax*a),t.lineTo(Ax*u-Sx*c,Sx*u+Ax*c),t.lineTo(Ax*r+Sx*i,Ax*i-Sx*r),t.lineTo(Ax*o+Sx*a,Ax*a-Sx*o),t.lineTo(Ax*u+Sx*c,Ax*c-Sx*u),t.closePath()}},Cx={draw(t,n){const e=.6189*wm(n-mm(n/6,1.7));t.moveTo(-e,-e),t.lineTo(e,e),t.moveTo(-e,e),t.lineTo(e,-e)}};const Px=[cx,fx,hx,gx,mx,wx,kx],zx=[cx,px,Cx,Tx,ux,yx,dx];function $x(){}function Dx(t,n,e){t._context.bezierCurveTo((2*t._x0+t._x1)/3,(2*t._y0+t._y1)/3,(t._x0+2*t._x1)/3,(t._y0+2*t._y1)/3,(t._x0+4*t._x1+n)/6,(t._y0+4*t._y1+e)/6)}function Rx(t){this._context=t}function Fx(t){this._context=t}function qx(t){this._context=t}function Ux(t,n){this._basis=new Rx(t),this._beta=n}Rx.prototype={areaStart:function(){this._line=0},areaEnd:function(){this._line=NaN},lineStart:function(){this._x0=this._x1=this._y0=this._y1=NaN,this._point=0},lineEnd:function(){switch(this._point){case 3:Dx(this,this._x1,this._y1);case 2:this._context.lineTo(this._x1,this._y1)}(this._line||0!==this._line&&1===this._point)&&this._context.closePath(),this._line=1-this._line},point:function(t,n){switch(t=+t,n=+n,this._point){case 0:this._point=1,this._line?this._context.lineTo(t,n):this._context.moveTo(t,n);break;case 1:this._point=2;break;case 2:this._point=3,this._context.lineTo((5*this._x0+this._x1)/6,(5*this._y0+this._y1)/6);default:Dx(this,t,n)}this._x0=this._x1,this._x1=t,this._y0=this._y1,this._y1=n}},Fx.prototype={areaStart:$x,areaEnd:$x,lineStart:function(){this._x0=this._x1=this._x2=this._x3=this._x4=this._y0=this._y1=this._y2=this._y3=this._y4=NaN,this._point=0},lineEnd:function(){switch(this._point){case 1:this._context.moveTo(this._x2,this._y2),this._context.closePath();break;case 2:this._context.moveTo((this._x2+2*this._x3)/3,(this._y2+2*this._y3)/3),this._context.lineTo((this._x3+2*this._x2)/3,(this._y3+2*this._y2)/3),this._context.closePath();break;case 3:this.point(this._x2,this._y2),this.point(this._x3,this._y3),this.point(this._x4,this._y4)}},point:function(t,n){switch(t=+t,n=+n,this._point){case 0:this._point=1,this._x2=t,this._y2=n;break;case 1:this._point=2,this._x3=t,this._y3=n;break;case 2:this._point=3,this._x4=t,this._y4=n,this._context.moveTo((this._x0+4*this._x1+t)/6,(this._y0+4*this._y1+n)/6);break;default:Dx(this,t,n)}this._x0=this._x1,this._x1=t,this._y0=this._y1,this._y1=n}},qx.prototype={areaStart:function(){this._line=0},areaEnd:function(){this._line=NaN},lineStart:function(){this._x0=this._x1=this._y0=this._y1=NaN,this._point=0},lineEnd:function(){(this._line||0!==this._line&&3===this._point)&&this._context.closePath(),this._line=1-this._line},point:function(t,n){switch(t=+t,n=+n,this._point){case 0:this._point=1;break;case 1:this._point=2;break;case 2:this._point=3;var e=(this._x0+4*this._x1+t)/6,r=(this._y0+4*this._y1+n)/6;this._line?this._context.lineTo(e,r):this._context.moveTo(e,r);break;case 3:this._point=4;default:Dx(this,t,n)}this._x0=this._x1,this._x1=t,this._y0=this._y1,this._y1=n}},Ux.prototype={lineStart:function(){this._x=[],this._y=[],this._basis.lineStart()},lineEnd:function(){var t=this._x,n=this._y,e=t.length-1;if(e>0)for(var r,i=t[0],o=n[0],a=t[e]-i,u=n[e]-o,c=-1;++c<=e;)r=c/e,this._basis.point(this._beta*t[c]+(1-this._beta)*(i+r*a),this._beta*n[c]+(1-this._beta)*(o+r*u));this._x=this._y=null,this._basis.lineEnd()},point:function(t,n){this._x.push(+t),this._y.push(+n)}};var Ix=function t(n){function e(t){return 1===n?new Rx(t):new Ux(t,n)}return e.beta=function(n){return t(+n)},e}(.85);function Ox(t,n,e){t._context.bezierCurveTo(t._x1+t._k*(t._x2-t._x0),t._y1+t._k*(t._y2-t._y0),t._x2+t._k*(t._x1-n),t._y2+t._k*(t._y1-e),t._x2,t._y2)}function Bx(t,n){this._context=t,this._k=(1-n)/6}Bx.prototype={areaStart:function(){this._line=0},areaEnd:function(){this._line=NaN},lineStart:function(){this._x0=this._x1=this._x2=this._y0=this._y1=this._y2=NaN,this._point=0},lineEnd:function(){switch(this._point){case 2:this._context.lineTo(this._x2,this._y2);break;case 3:Ox(this,this._x1,this._y1)}(this._line||0!==this._line&&1===this._point)&&this._context.closePath(),this._line=1-this._line},point:function(t,n){switch(t=+t,n=+n,this._point){case 0:this._point=1,this._line?this._context.lineTo(t,n):this._context.moveTo(t,n);break;case 1:this._point=2,this._x1=t,this._y1=n;break;case 2:this._point=3;default:Ox(this,t,n)}this._x0=this._x1,this._x1=this._x2,this._x2=t,this._y0=this._y1,this._y1=this._y2,this._y2=n}};var Yx=function t(n){function e(t){return new Bx(t,n)}return e.tension=function(n){return t(+n)},e}(0);function Lx(t,n){this._context=t,this._k=(1-n)/6}Lx.prototype={areaStart:$x,areaEnd:$x,lineStart:function(){this._x0=this._x1=this._x2=this._x3=this._x4=this._x5=this._y0=this._y1=this._y2=this._y3=this._y4=this._y5=NaN,this._point=0},lineEnd:function(){switch(this._point){case 1:this._context.moveTo(this._x3,this._y3),this._context.closePath();break;case 2:this._context.lineTo(this._x3,this._y3),this._context.closePath();break;case 3:this.point(this._x3,this._y3),this.point(this._x4,this._y4),this.point(this._x5,this._y5)}},point:function(t,n){switch(t=+t,n=+n,this._point){case 0:this._point=1,this._x3=t,this._y3=n;break;case 1:this._point=2,this._context.moveTo(this._x4=t,this._y4=n);break;case 2:this._point=3,this._x5=t,this._y5=n;break;default:Ox(this,t,n)}this._x0=this._x1,this._x1=this._x2,this._x2=t,this._y0=this._y1,this._y1=this._y2,this._y2=n}};var jx=function t(n){function e(t){return new Lx(t,n)}return e.tension=function(n){return t(+n)},e}(0);function Hx(t,n){this._context=t,this._k=(1-n)/6}Hx.prototype={areaStart:function(){this._line=0},areaEnd:function(){this._line=NaN},lineStart:function(){this._x0=this._x1=this._x2=this._y0=this._y1=this._y2=NaN,this._point=0},lineEnd:function(){(this._line||0!==this._line&&3===this._point)&&this._context.closePath(),this._line=1-this._line},point:function(t,n){switch(t=+t,n=+n,this._point){case 0:this._point=1;break;case 1:this._point=2;break;case 2:this._point=3,this._line?this._context.lineTo(this._x2,this._y2):this._context.moveTo(this._x2,this._y2);break;case 3:this._point=4;default:Ox(this,t,n)}this._x0=this._x1,this._x1=this._x2,this._x2=t,this._y0=this._y1,this._y1=this._y2,this._y2=n}};var Xx=function t(n){function e(t){return new Hx(t,n)}return e.tension=function(n){return t(+n)},e}(0);function Gx(t,n,e){var r=t._x1,i=t._y1,o=t._x2,a=t._y2;if(t._l01_a>Mm){var u=2*t._l01_2a+3*t._l01_a*t._l12_a+t._l12_2a,c=3*t._l01_a*(t._l01_a+t._l12_a);r=(r*u-t._x0*t._l12_2a+t._x2*t._l01_2a)/c,i=(i*u-t._y0*t._l12_2a+t._y2*t._l01_2a)/c}if(t._l23_a>Mm){var f=2*t._l23_2a+3*t._l23_a*t._l12_a+t._l12_2a,s=3*t._l23_a*(t._l23_a+t._l12_a);o=(o*f+t._x1*t._l23_2a-n*t._l12_2a)/s,a=(a*f+t._y1*t._l23_2a-e*t._l12_2a)/s}t._context.bezierCurveTo(r,i,o,a,t._x2,t._y2)}function Vx(t,n){this._context=t,this._alpha=n}Vx.prototype={areaStart:function(){this._line=0},areaEnd:function(){this._line=NaN},lineStart:function(){this._x0=this._x1=this._x2=this._y0=this._y1=this._y2=NaN,this._l01_a=this._l12_a=this._l23_a=this._l01_2a=this._l12_2a=this._l23_2a=this._point=0},lineEnd:function(){switch(this._point){case 2:this._context.lineTo(this._x2,this._y2);break;case 3:this.point(this._x2,this._y2)}(this._line||0!==this._line&&1===this._point)&&this._context.closePath(),this._line=1-this._line},point:function(t,n){if(t=+t,n=+n,this._point){var e=this._x2-t,r=this._y2-n;this._l23_a=Math.sqrt(this._l23_2a=Math.pow(e*e+r*r,this._alpha))}switch(this._point){case 0:this._point=1,this._line?this._context.lineTo(t,n):this._context.moveTo(t,n);break;case 1:this._point=2;break;case 2:this._point=3;default:Gx(this,t,n)}this._l01_a=this._l12_a,this._l12_a=this._l23_a,this._l01_2a=this._l12_2a,this._l12_2a=this._l23_2a,this._x0=this._x1,this._x1=this._x2,this._x2=t,this._y0=this._y1,this._y1=this._y2,this._y2=n}};var Wx=function t(n){function e(t){return n?new Vx(t,n):new Bx(t,0)}return e.alpha=function(n){return t(+n)},e}(.5);function Zx(t,n){this._context=t,this._alpha=n}Zx.prototype={areaStart:$x,areaEnd:$x,lineStart:function(){this._x0=this._x1=this._x2=this._x3=this._x4=this._x5=this._y0=this._y1=this._y2=this._y3=this._y4=this._y5=NaN,this._l01_a=this._l12_a=this._l23_a=this._l01_2a=this._l12_2a=this._l23_2a=this._point=0},lineEnd:function(){switch(this._point){case 1:this._context.moveTo(this._x3,this._y3),this._context.closePath();break;case 2:this._context.lineTo(this._x3,this._y3),this._context.closePath();break;case 3:this.point(this._x3,this._y3),this.point(this._x4,this._y4),this.point(this._x5,this._y5)}},point:function(t,n){if(t=+t,n=+n,this._point){var e=this._x2-t,r=this._y2-n;this._l23_a=Math.sqrt(this._l23_2a=Math.pow(e*e+r*r,this._alpha))}switch(this._point){case 0:this._point=1,this._x3=t,this._y3=n;break;case 1:this._point=2,this._context.moveTo(this._x4=t,this._y4=n);break;case 2:this._point=3,this._x5=t,this._y5=n;break;default:Gx(this,t,n)}this._l01_a=this._l12_a,this._l12_a=this._l23_a,this._l01_2a=this._l12_2a,this._l12_2a=this._l23_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diff --git a/Lib/profiling/sampling/flamegraph.css b/Lib/profiling/sampling/flamegraph.css
new file mode 100644 (file)
index 0000000..9d47065
--- /dev/null
@@ -0,0 +1,405 @@
+body {
+  font-family:
+    "Source Sans Pro", "Lucida Grande", "Lucida Sans Unicode", "Geneva",
+    "Verdana", sans-serif;
+  margin: 0;
+  padding: 0;
+  background: #ffffff;
+  color: #2e3338;
+  line-height: 1.6;
+}
+
+.header {
+  background: linear-gradient(135deg, #3776ab 0%, #4584bb 100%);
+  color: white;
+  padding: 32px 0;
+  box-shadow: 0 2px 10px rgba(55, 118, 171, 0.2);
+}
+
+.header-content {
+  max-width: 1200px;
+  margin: 0 auto;
+  padding: 0 24px;
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  justify-content: center;
+  text-align: center;
+  gap: 20px;
+}
+
+.python-logo {
+  width: auto;
+  height: 72px;
+  margin-bottom: 12px; /* tighter spacing to avoid visual gap */
+  flex-shrink: 0;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+}
+
+.python-logo img {
+  height: 72px;
+  width: auto;
+  display: block; /* avoid baseline alignment issues */
+  vertical-align: middle;
+  /* subtle shadow that does not affect layout */
+  filter: drop-shadow(0 2px 6px rgba(0, 0, 0, 0.1));
+}
+
+.header-text h1 {
+  margin: 0;
+  font-size: 2.5em;
+  font-weight: 600;
+  color: white;
+  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
+}
+
+.header-text .subtitle {
+  margin: 8px 0 0 0;
+  font-size: 1.1em;
+  color: rgba(255, 255, 255, 0.9);
+  font-weight: 300;
+}
+
+.header-search {
+  width: 100%;
+  max-width: 500px;
+}
+
+.header-search #search-input {
+  width: 100%;
+  padding: 12px 20px;
+  border: 2px solid rgba(255, 255, 255, 0.2);
+  border-radius: 25px;
+  font-size: 16px;
+  font-family: inherit;
+  background: rgba(255, 255, 255, 0.95);
+  color: #2e3338;
+  transition: all 0.3s ease;
+  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
+  backdrop-filter: blur(10px);
+}
+
+.header-search #search-input:focus {
+  outline: none;
+  border-color: rgba(255, 255, 255, 0.8);
+  background: rgba(255, 255, 255, 1);
+  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
+  transform: translateY(-2px);
+}
+
+.header-search #search-input::placeholder {
+  color: #6c757d;
+}
+
+.stats-section {
+  background: #ffffff;
+  padding: 24px 0;
+  border-bottom: 1px solid #e9ecef;
+}
+
+.stats-container {
+  max-width: 1200px;
+  margin: 0 auto;
+  padding: 0 24px;
+  display: grid;
+  grid-template-columns: repeat(3, 1fr);
+  gap: 20px;
+}
+
+.stat-card {
+  background: #ffffff;
+  border: 1px solid #e9ecef;
+  border-radius: 12px;
+  padding: 20px;
+  display: flex;
+  align-items: flex-start;
+  gap: 16px;
+  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
+  transition: all 0.2s ease;
+  min-height: 120px;
+}
+
+.stat-card:hover {
+  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
+  transform: translateY(-2px);
+}
+
+.stat-icon {
+  font-size: 32px;
+  width: 56px;
+  height: 56px;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  background: linear-gradient(135deg, #3776ab 0%, #4584bb 100%);
+  border-radius: 50%;
+  flex-shrink: 0;
+  box-shadow: 0 2px 8px rgba(55, 118, 171, 0.3);
+}
+
+.stat-content {
+  flex: 1;
+}
+
+.stat-label {
+  font-size: 14px;
+  color: #5a6c7d;
+  font-weight: 500;
+  margin-bottom: 4px;
+  text-transform: uppercase;
+  letter-spacing: 0.5px;
+}
+
+.stat-value {
+  font-size: 16px;
+  font-weight: 700;
+  color: #2e3338;
+  line-height: 1.3;
+  margin-bottom: 4px;
+  word-break: break-word;
+  overflow-wrap: break-word;
+}
+
+.stat-file {
+  font-size: 12px;
+  color: #8b949e;
+  font-weight: 400;
+  margin-bottom: 2px;
+  font-family: 'SF Mono', 'Monaco', 'Consolas', monospace;
+  word-break: break-word;
+  overflow-wrap: break-word;
+}
+
+.stat-detail {
+  font-size: 12px;
+  color: #5a6c7d;
+  font-weight: 400;
+  line-height: 1.4;
+  font-family: 'SF Mono', 'Monaco', 'Consolas', monospace;
+  word-break: break-word;
+  overflow-wrap: break-word;
+}
+
+.controls {
+  background: #f8f9fa;
+  border-bottom: 1px solid #e9ecef;
+  padding: 20px 0;
+  text-align: center;
+}
+
+.controls-content {
+  max-width: 1200px;
+  margin: 0 auto;
+  padding: 0 24px;
+  text-align: center;
+}
+
+
+.controls button {
+  background: #3776ab;
+  color: white;
+  border: none;
+  padding: 12px 24px;
+  margin: 0 8px;
+  border-radius: 6px;
+  cursor: pointer;
+  font-weight: 600;
+  font-size: 14px;
+  font-family: inherit;
+  transition: all 0.2s ease;
+  box-shadow: 0 2px 4px rgba(55, 118, 171, 0.2);
+}
+
+.controls button:hover {
+  background: #2d5aa0;
+  transform: translateY(-1px);
+  box-shadow: 0 4px 8px rgba(55, 118, 171, 0.3);
+}
+
+.controls button.secondary {
+  background: #ffd43b;
+  color: #2e3338;
+}
+
+.controls button.secondary:hover {
+  background: #ffcd02;
+}
+
+#chart {
+  width: 100%;
+  height: calc(100vh - 160px);
+  overflow: hidden;
+  background: #ffffff;
+  padding: 0 40px;
+}
+
+.d3-flame-graph rect {
+  /* Prefer selector specificity instead of !important */
+  stroke: rgba(55, 118, 171, 0.3);
+  stroke-width: 1px;
+  cursor: pointer;
+  transition: all 0.1s ease;
+}
+
+.d3-flame-graph rect:hover {
+  stroke: #3776ab;
+  stroke-width: 2px;
+  filter: brightness(1.05);
+}
+
+.d3-flame-graph text {
+  /* Ensure labels use our font without !important */
+  font-family: "Source Sans Pro", sans-serif;
+  font-size: 12px;
+  font-weight: 500;
+  fill: #2e3338;
+  pointer-events: none;
+}
+
+.info-panel {
+  position: fixed;
+  bottom: 24px;
+  left: 84px; /* Leave space for the button */
+  background: white;
+  padding: 24px;
+  border-radius: 8px;
+  border: 1px solid #e9ecef;
+  font-size: 14px;
+  max-width: 280px;
+  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
+  z-index: 1000;
+  display: none;
+}
+
+.info-panel h3 {
+  margin: 0 0 16px 0;
+  color: #3776ab;
+  font-weight: 600;
+  font-size: 16px;
+  border-bottom: 2px solid #ffd43b;
+  padding-bottom: 8px;
+}
+
+.info-panel p {
+  margin: 12px 0;
+  color: #5a6c7d;
+  line-height: 1.5;
+}
+
+.info-panel strong {
+  color: #3776ab;
+}
+
+#show-info-btn {
+  position: fixed;
+  bottom: 32px;
+  left: 32px;
+  z-index: 1100;
+  width: 44px;
+  height: 44px;
+  border-radius: 50%;
+  background: #3776ab;
+  color: white;
+  border: none;
+  font-size: 24px;
+  box-shadow: 0 2px 8px rgba(55, 118, 171, 0.15);
+  cursor: pointer;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  transition: background 0.2s;
+}
+
+#show-info-btn:hover {
+  background: #2d5aa0;
+}
+
+#close-info-btn {
+  position: absolute;
+  top: 8px;
+  right: 12px;
+  background: none;
+  border: none;
+  font-size: 20px;
+  cursor: pointer;
+  color: #3776ab;
+}
+
+@media (max-width: 600px) {
+  .python-logo { height: 48px; }
+  .python-logo img { height: 48px; }
+  #show-info-btn {
+    left: 8px;
+    bottom: 8px;
+  }
+  .info-panel {
+    left: 60px; /* Still leave space for button */
+    bottom: 8px;
+    max-width: 90vw;
+  }
+}
+
+.legend-panel {
+  position: fixed;
+  top: 24px;
+  left: 24px;
+  background: white;
+  padding: 24px;
+  border-radius: 8px;
+  border: 1px solid #e9ecef;
+  font-size: 14px;
+  max-width: 320px;
+  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
+  display: none;
+  z-index: 1001;
+}
+
+.legend-panel h3 {
+  margin: 0 0 20px 0;
+  color: #3776ab;
+  font-weight: 600;
+  font-size: 18px;
+  text-align: center;
+  border-bottom: 2px solid #ffd43b;
+  padding-bottom: 8px;
+}
+
+.legend-item {
+  display: flex;
+  align-items: center;
+  margin: 12px 0;
+  padding: 10px;
+  border-radius: 6px;
+  background: #f8f9fa;
+  border: 1px solid #e9ecef;
+}
+
+.legend-color {
+  width: 28px;
+  height: 18px;
+  border-radius: 4px;
+  margin-right: 16px;
+  border: 1px solid rgba(0, 0, 0, 0.1);
+  flex-shrink: 0;
+}
+
+.legend-label {
+  color: #2e3338;
+  font-weight: 600;
+  flex: 1;
+}
+
+.legend-description {
+  color: #5a6c7d;
+  font-size: 12px;
+  margin-top: 2px;
+  font-weight: 400;
+}
+
+.chart-container {
+  background: #ffffff;
+  margin: 0;
+  padding: 12px 0;
+}
diff --git a/Lib/profiling/sampling/flamegraph.js b/Lib/profiling/sampling/flamegraph.js
new file mode 100644 (file)
index 0000000..27dff3b
--- /dev/null
@@ -0,0 +1,445 @@
+const EMBEDDED_DATA = {{FLAMEGRAPH_DATA}};
+
+// Python color palette - cold to hot
+const pythonColors = [
+  "#fff4bf", // Coldest - light yellow (<1%)
+  "#ffec9e", // Cold - yellow (1-3%)
+  "#ffe47d", // Cool - golden yellow (3-6%)
+  "#ffdc5c", // Medium - golden (6-12%)
+  "#ffd43b", // Warm - Python gold (12-18%)
+  "#5592cc", // Hot - light blue (18-35%)
+  "#4584bb", // Very hot - medium blue (35-60%)
+  "#3776ab", // Hottest - Python blue (≥60%)
+];
+
+function ensureLibraryLoaded() {
+  if (typeof flamegraph === "undefined") {
+    console.error("d3-flame-graph library not loaded");
+    document.getElementById("chart").innerHTML =
+      '<h2 style="text-align: center; color: #d32f2f;">Error: d3-flame-graph library failed to load</h2>';
+    throw new Error("d3-flame-graph library failed to load");
+  }
+}
+
+function createPythonTooltip(data) {
+  const pythonTooltip = flamegraph.tooltip.defaultFlamegraphTooltip();
+  pythonTooltip.show = function (d, element) {
+    if (!this._tooltip) {
+      this._tooltip = d3
+        .select("body")
+        .append("div")
+        .attr("class", "python-tooltip")
+        .style("position", "absolute")
+        .style("padding", "20px")
+        .style("background", "white")
+        .style("color", "#2e3338")
+        .style("border-radius", "8px")
+        .style("font-size", "14px")
+        .style("border", "1px solid #e9ecef")
+        .style("box-shadow", "0 8px 30px rgba(0, 0, 0, 0.15)")
+        .style("z-index", "1000")
+        .style("pointer-events", "none")
+        .style("font-weight", "400")
+        .style("line-height", "1.5")
+        .style("max-width", "500px")
+        .style("font-family", "'Source Sans Pro', sans-serif")
+        .style("opacity", 0);
+    }
+
+    const timeMs = (d.data.value / 1000).toFixed(2);
+    const percentage = ((d.data.value / data.value) * 100).toFixed(2);
+    const calls = d.data.calls || 0;
+    const childCount = d.children ? d.children.length : 0;
+    const source = d.data.source;
+
+    // Create source code section if available
+    let sourceSection = "";
+    if (source && Array.isArray(source) && source.length > 0) {
+      const sourceLines = source
+        .map(
+          (line) =>
+            `<div style="font-family: 'SF Mono', 'Monaco', 'Consolas', ` +
+            `monospace; font-size: 12px; color: ${
+              line.startsWith("→") ? "#3776ab" : "#5a6c7d"
+            }; white-space: pre; line-height: 1.4; padding: 2px 0;">${line
+              .replace(/&/g, "&amp;")
+              .replace(/</g, "&lt;")
+              .replace(/>/g, "&gt;")}</div>`,
+        )
+        .join("");
+
+      sourceSection = `
+        <div style="margin-top: 16px; padding-top: 12px;
+                    border-top: 1px solid #e9ecef;">
+          <div style="color: #3776ab; font-size: 13px;
+                      margin-bottom: 8px; font-weight: 600;">
+            Source Code:
+          </div>
+          <div style="background: #f8f9fa; border: 1px solid #e9ecef;
+                      border-radius: 6px; padding: 12px; max-height: 150px;
+                      overflow-y: auto;">
+            ${sourceLines}
+          </div>
+        </div>`;
+    } else if (source) {
+      // Show debug info if source exists but isn't an array
+      sourceSection = `
+        <div style="margin-top: 16px; padding-top: 12px;
+                    border-top: 1px solid #e9ecef;">
+          <div style="color: #d32f2f; font-size: 13px;
+                      margin-bottom: 8px; font-weight: 600;">
+            [Debug] - Source data type: ${typeof source}
+          </div>
+          <div style="background: #f8f9fa; border: 1px solid #e9ecef;
+                      border-radius: 6px; padding: 12px; max-height: 150px;
+                      overflow-y: auto; font-family: monospace; font-size: 11px;">
+            ${JSON.stringify(source, null, 2)}
+          </div>
+        </div>`;
+    }
+
+    const tooltipHTML = `
+      <div>
+        <div style="color: #3776ab; font-weight: 600; font-size: 16px;
+                    margin-bottom: 8px; line-height: 1.3;">
+          ${d.data.funcname || d.data.name}
+        </div>
+        <div style="color: #5a6c7d; font-size: 13px; margin-bottom: 12px;
+                    font-family: monospace; background: #f8f9fa;
+                    padding: 4px 8px; border-radius: 4px;">
+          ${d.data.filename || ""}${d.data.lineno ? ":" + d.data.lineno : ""}
+        </div>
+        <div style="display: grid; grid-template-columns: auto 1fr;
+                    gap: 8px 16px; font-size: 14px;">
+          <span style="color: #5a6c7d; font-weight: 500;">Execution Time:</span>
+          <strong style="color: #2e3338;">${timeMs} ms</strong>
+
+          <span style="color: #5a6c7d; font-weight: 500;">Percentage:</span>
+          <strong style="color: #3776ab;">${percentage}%</strong>
+
+          ${calls > 0 ? `
+            <span style="color: #5a6c7d; font-weight: 500;">Function Calls:</span>
+            <strong style="color: #2e3338;">${calls.toLocaleString()}</strong>
+          ` : ''}
+
+          ${childCount > 0 ? `
+            <span style="color: #5a6c7d; font-weight: 500;">Child Functions:</span>
+            <strong style="color: #2e3338;">${childCount}</strong>
+          ` : ''}
+        </div>
+        ${sourceSection}
+        <div style="margin-top: 16px; padding-top: 12px;
+                    border-top: 1px solid #e9ecef; font-size: 13px;
+                    color: #5a6c7d; text-align: center;">
+          ${childCount > 0 ?
+            "Click to focus on this function" :
+            "Leaf function - no children"}
+        </div>
+      </div>
+    `;
+
+    // Get mouse position
+    const event = d3.event || window.event;
+    const mouseX = event.pageX || event.clientX;
+    const mouseY = event.pageY || event.clientY;
+
+    // Calculate tooltip dimensions (default to 320px width if not rendered yet)
+    let tooltipWidth = 320;
+    let tooltipHeight = 200;
+    if (this._tooltip && this._tooltip.node()) {
+      const node = this._tooltip
+        .style("opacity", 0)
+        .style("display", "block")
+        .node();
+      tooltipWidth = node.offsetWidth || 320;
+      tooltipHeight = node.offsetHeight || 200;
+      this._tooltip.style("display", null);
+    }
+
+    // Calculate horizontal position: if overflow, show to the left of cursor
+    const padding = 10;
+    const rightEdge = mouseX + padding + tooltipWidth;
+    const viewportWidth = window.innerWidth;
+    let left;
+    if (rightEdge > viewportWidth) {
+      left = mouseX - tooltipWidth - padding;
+      if (left < 0) left = padding; // prevent off left edge
+    } else {
+      left = mouseX + padding;
+    }
+
+    // Calculate vertical position: if overflow, show above cursor
+    const bottomEdge = mouseY + padding + tooltipHeight;
+    const viewportHeight = window.innerHeight;
+    let top;
+    if (bottomEdge > viewportHeight) {
+      top = mouseY - tooltipHeight - padding;
+      if (top < 0) top = padding; // prevent off top edge
+    } else {
+      top = mouseY + padding;
+    }
+
+    this._tooltip
+      .html(tooltipHTML)
+      .style("left", left + "px")
+      .style("top", top + "px")
+      .transition()
+      .duration(200)
+      .style("opacity", 1);
+  };
+
+  // Override the hide method
+  pythonTooltip.hide = function () {
+    if (this._tooltip) {
+      this._tooltip.transition().duration(200).style("opacity", 0);
+    }
+  };
+  return pythonTooltip;
+}
+
+function createFlamegraph(tooltip, rootValue) {
+  let chart = flamegraph()
+    .width(window.innerWidth - 80)
+    .cellHeight(20)
+    .transitionDuration(300)
+    .minFrameSize(1)
+    .tooltip(tooltip)
+    .inverted(true)
+    .setColorMapper(function (d) {
+      const percentage = d.data.value / rootValue;
+      let colorIndex;
+      if (percentage >= 0.6) colorIndex = 7;
+      else if (percentage >= 0.35) colorIndex = 6;
+      else if (percentage >= 0.18) colorIndex = 5;
+      else if (percentage >= 0.12) colorIndex = 4;
+      else if (percentage >= 0.06) colorIndex = 3;
+      else if (percentage >= 0.03) colorIndex = 2;
+      else if (percentage >= 0.01) colorIndex = 1;
+      else colorIndex = 0; // <1%
+      return pythonColors[colorIndex];
+    });
+  return chart;
+}
+
+function renderFlamegraph(chart, data) {
+  d3.select("#chart").datum(data).call(chart);
+  window.flamegraphChart = chart; // for controls
+  window.flamegraphData = data;   // for resize/search
+  populateStats(data);
+}
+
+function attachPanelControls() {
+  const infoBtn = document.getElementById("show-info-btn");
+  const infoPanel = document.getElementById("info-panel");
+  const closeBtn = document.getElementById("close-info-btn");
+  if (infoBtn && infoPanel) {
+    infoBtn.addEventListener("click", function () {
+      const isOpen = infoPanel.style.display === "block";
+      infoPanel.style.display = isOpen ? "none" : "block";
+    });
+  }
+  if (closeBtn && infoPanel) {
+    closeBtn.addEventListener("click", function () {
+      infoPanel.style.display = "none";
+    });
+  }
+}
+
+function updateSearchHighlight(searchTerm, searchInput) {
+  d3.selectAll("#chart rect")
+    .style("stroke", null)
+    .style("stroke-width", null)
+    .style("opacity", null);
+  if (searchTerm && searchTerm.length > 0) {
+    d3.selectAll("#chart rect").style("opacity", 0.3);
+    let matchCount = 0;
+    d3.selectAll("#chart rect").each(function (d) {
+      if (d && d.data) {
+        const name = d.data.name || "";
+        const funcname = d.data.funcname || "";
+        const filename = d.data.filename || "";
+        const term = searchTerm.toLowerCase();
+        const matches =
+          name.toLowerCase().includes(term) ||
+          funcname.toLowerCase().includes(term) ||
+          filename.toLowerCase().includes(term);
+        if (matches) {
+          matchCount++;
+          d3.select(this)
+            .style("opacity", 1)
+            .style("stroke", "#ff6b35")
+            .style("stroke-width", "2px")
+            .style("stroke-dasharray", "3,3");
+        }
+      }
+    });
+    if (searchInput) {
+      if (matchCount > 0) {
+        searchInput.style.borderColor = "rgba(40, 167, 69, 0.8)";
+        searchInput.style.boxShadow = "0 6px 20px rgba(40, 167, 69, 0.2)";
+      } else {
+        searchInput.style.borderColor = "rgba(220, 53, 69, 0.8)";
+        searchInput.style.boxShadow = "0 6px 20px rgba(220, 53, 69, 0.2)";
+      }
+    }
+  } else if (searchInput) {
+    searchInput.style.borderColor = "rgba(255, 255, 255, 0.2)";
+    searchInput.style.boxShadow = "0 4px 12px rgba(0, 0, 0, 0.1)";
+  }
+}
+
+function initSearchHandlers() {
+  const searchInput = document.getElementById("search-input");
+  if (!searchInput) return;
+  let searchTimeout;
+  function performSearch() {
+    const term = searchInput.value.trim();
+    updateSearchHighlight(term, searchInput);
+  }
+  searchInput.addEventListener("input", function () {
+    clearTimeout(searchTimeout);
+    searchTimeout = setTimeout(performSearch, 150);
+  });
+  window.performSearch = performSearch;
+}
+
+function handleResize(chart, data) {
+  window.addEventListener("resize", function () {
+    if (chart && data) {
+      const newWidth = window.innerWidth - 80;
+      chart.width(newWidth);
+      d3.select("#chart").datum(data).call(chart);
+    }
+  });
+}
+
+function initFlamegraph() {
+  ensureLibraryLoaded();
+  const tooltip = createPythonTooltip(EMBEDDED_DATA);
+  const chart = createFlamegraph(tooltip, EMBEDDED_DATA.value);
+  renderFlamegraph(chart, EMBEDDED_DATA);
+  attachPanelControls();
+  initSearchHandlers();
+  handleResize(chart, EMBEDDED_DATA);
+}
+
+if (document.readyState === "loading") {
+  document.addEventListener("DOMContentLoaded", initFlamegraph);
+} else {
+  initFlamegraph();
+}
+
+function populateStats(data) {
+  const totalSamples = data.value || 0;
+
+  // Collect all functions with their metrics, aggregated by function name
+  const functionMap = new Map();
+
+  function collectFunctions(node) {
+    if (node.filename && node.funcname) {
+      // Calculate direct samples (this node's value minus children's values)
+      let childrenValue = 0;
+      if (node.children) {
+        childrenValue = node.children.reduce((sum, child) => sum + child.value, 0);
+      }
+      const directSamples = Math.max(0, node.value - childrenValue);
+
+      // Use file:line:funcname as key to ensure uniqueness
+      const funcKey = `${node.filename}:${node.lineno || '?'}:${node.funcname}`;
+
+      if (functionMap.has(funcKey)) {
+        const existing = functionMap.get(funcKey);
+        existing.directSamples += directSamples;
+        existing.directPercent = (existing.directSamples / totalSamples) * 100;
+        // Keep the most representative file/line (the one with more samples)
+        if (directSamples > existing.maxSingleSamples) {
+          existing.filename = node.filename;
+          existing.lineno = node.lineno || '?';
+          existing.maxSingleSamples = directSamples;
+        }
+      } else {
+        functionMap.set(funcKey, {
+          filename: node.filename,
+          lineno: node.lineno || '?',
+          funcname: node.funcname,
+          directSamples,
+          directPercent: (directSamples / totalSamples) * 100,
+          maxSingleSamples: directSamples
+        });
+      }
+    }
+
+    if (node.children) {
+      node.children.forEach(child => collectFunctions(child));
+    }
+  }
+
+  collectFunctions(data);
+
+  // Convert map to array and get top 3 hotspots
+  const hotSpots = Array.from(functionMap.values())
+    .filter(f => f.directPercent > 0.5) // At least 0.5% to be significant
+    .sort((a, b) => b.directPercent - a.directPercent)
+    .slice(0, 3);
+
+  // Populate the 3 cards
+  for (let i = 0; i < 3; i++) {
+    const num = i + 1;
+    if (i < hotSpots.length) {
+      const hotspot = hotSpots[i];
+      const basename = hotspot.filename.split('/').pop();
+      let funcDisplay = hotspot.funcname;
+      if (funcDisplay.length > 35) {
+        funcDisplay = funcDisplay.substring(0, 32) + '...';
+      }
+
+      document.getElementById(`hotspot-file-${num}`).textContent = `${basename}:${hotspot.lineno}`;
+      document.getElementById(`hotspot-func-${num}`).textContent = funcDisplay;
+      document.getElementById(`hotspot-detail-${num}`).textContent = `${hotspot.directPercent.toFixed(1)}% samples (${hotspot.directSamples.toLocaleString()})`;
+    } else {
+      document.getElementById(`hotspot-file-${num}`).textContent = '--';
+      document.getElementById(`hotspot-func-${num}`).textContent = '--';
+      document.getElementById(`hotspot-detail-${num}`).textContent = '--';
+    }
+  }
+}
+
+// Control functions
+function resetZoom() {
+  if (window.flamegraphChart) {
+    window.flamegraphChart.resetZoom();
+  }
+}
+
+function exportSVG() {
+  const svgElement = document.querySelector("#chart svg");
+  if (svgElement) {
+    const serializer = new XMLSerializer();
+    const svgString = serializer.serializeToString(svgElement);
+    const blob = new Blob([svgString], { type: "image/svg+xml" });
+    const url = URL.createObjectURL(blob);
+    const a = document.createElement("a");
+    a.href = url;
+    a.download = "python-performance-flamegraph.svg";
+    a.click();
+    URL.revokeObjectURL(url);
+  }
+}
+
+function toggleLegend() {
+  const legendPanel = document.getElementById("legend-panel");
+  const isHidden =
+    legendPanel.style.display === "none" || legendPanel.style.display === "";
+  legendPanel.style.display = isHidden ? "block" : "none";
+}
+
+function clearSearch() {
+  const searchInput = document.getElementById("search-input");
+  if (searchInput) {
+    searchInput.value = "";
+    if (window.flamegraphChart) {
+      window.flamegraphChart.clear();
+    }
+  }
+}
+
diff --git a/Lib/profiling/sampling/flamegraph_template.html b/Lib/profiling/sampling/flamegraph_template.html
new file mode 100644 (file)
index 0000000..358791e
--- /dev/null
@@ -0,0 +1,147 @@
+<!doctype html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>Python Performance Flamegraph</title>
+    <!-- INLINE_VENDOR_D3_JS -->
+    <!-- INLINE_VENDOR_FLAMEGRAPH_CSS -->
+    <!-- INLINE_VENDOR_FLAMEGRAPH_JS -->
+    <!-- INLINE_VENDOR_FLAMEGRAPH_TOOLTIP_JS -->
+    <!-- INLINE_CSS -->
+  </head>
+  <body>
+    <div class="header">
+      <div class="header-content">
+        <div class="python-logo"><!-- INLINE_LOGO --></div>
+        <div class="header-text">
+          <h1>Tachyon Profiler Performance Flamegraph</h1>
+          <div class="subtitle">
+            Interactive visualization of function call performance
+          </div>
+        </div>
+        <div class="header-search">
+          <input type="text" id="search-input" placeholder="🔍 Search functions..." />
+        </div>
+      </div>
+    </div>
+
+    <div class="stats-section">
+      <div class="stats-container">
+        <div class="stat-card hotspot-card">
+          <div class="stat-icon">🥇</div>
+          <div class="stat-content">
+            <div class="stat-label">#1 Hot Spot</div>
+            <div class="stat-file" id="hotspot-file-1">--</div>
+            <div class="stat-value" id="hotspot-func-1">--</div>
+            <div class="stat-detail" id="hotspot-detail-1">--</div>
+          </div>
+        </div>
+        <div class="stat-card hotspot-card">
+          <div class="stat-icon">🥈</div>
+          <div class="stat-content">
+            <div class="stat-label">#2 Hot Spot</div>
+            <div class="stat-file" id="hotspot-file-2">--</div>
+            <div class="stat-value" id="hotspot-func-2">--</div>
+            <div class="stat-detail" id="hotspot-detail-2">--</div>
+          </div>
+        </div>
+        <div class="stat-card hotspot-card">
+          <div class="stat-icon">🥉</div>
+          <div class="stat-content">
+            <div class="stat-label">#3 Hot Spot</div>
+            <div class="stat-file" id="hotspot-file-3">--</div>
+            <div class="stat-value" id="hotspot-func-3">--</div>
+            <div class="stat-detail" id="hotspot-detail-3">--</div>
+          </div>
+        </div>
+      </div>
+    </div>
+
+    <div class="controls">
+      <div class="controls-content">
+        <button onclick="resetZoom()">🏠 Reset Zoom</button>
+        <button onclick="exportSVG()" class="secondary">📁 Export SVG</button>
+        <button onclick="toggleLegend()">🔥 Heat Map Legend</button>
+      </div>
+    </div>
+
+    <button id="show-info-btn" title="Show navigation guide">&#8505;</button>
+
+    <div class="info-panel" id="info-panel">
+      <button id="close-info-btn" title="Close">&times;</button>
+      <h3>Navigation Guide</h3>
+      <p><strong>Click:</strong> Zoom into function</p>
+      <p><strong>Hover:</strong> Show detailed information</p>
+      <p><strong>Width:</strong> Time spent in function</p>
+      <p><strong>Height:</strong> Call stack depth</p>
+      <p><strong>Color:</strong> Performance intensity</p>
+    </div>
+
+    <div class="legend-panel" id="legend-panel">
+      <h3>🔥 Performance Heat Map</h3>
+      <div class="legend-item">
+        <div class="legend-color" style="background-color: #3776ab"></div>
+        <div>
+          <div class="legend-label">Hottest Functions (≥60%)</div>
+          <div class="legend-description">Highest performance impact</div>
+        </div>
+      </div>
+      <div class="legend-item">
+        <div class="legend-color" style="background-color: #4584bb"></div>
+        <div>
+          <div class="legend-label">Very Hot Functions (35-60%)</div>
+          <div class="legend-description">High performance impact</div>
+        </div>
+      </div>
+      <div class="legend-item">
+        <div class="legend-color" style="background-color: #5592cc"></div>
+        <div>
+          <div class="legend-label">Hot Functions (18-35%)</div>
+          <div class="legend-description">Notable performance cost</div>
+        </div>
+      </div>
+      <div class="legend-item">
+        <div class="legend-color" style="background-color: #ffd43b"></div>
+        <div>
+          <div class="legend-label">Warm Functions (12-18%)</div>
+          <div class="legend-description">Moderate impact</div>
+        </div>
+      </div>
+      <div class="legend-item">
+        <div class="legend-color" style="background-color: #ffdc5c"></div>
+        <div>
+          <div class="legend-label">Medium Functions (6-12%)</div>
+          <div class="legend-description">Some performance impact</div>
+        </div>
+      </div>
+      <div class="legend-item">
+        <div class="legend-color" style="background-color: #ffe47d"></div>
+        <div>
+          <div class="legend-label">Cool Functions (3-6%)</div>
+          <div class="legend-description">Low performance impact</div>
+        </div>
+      </div>
+      <div class="legend-item">
+        <div class="legend-color" style="background-color: #ffec9e"></div>
+        <div>
+          <div class="legend-label">Cold Functions (1-3%)</div>
+          <div class="legend-description">Minimal performance impact</div>
+        </div>
+      </div>
+      <div class="legend-item">
+        <div class="legend-color" style="background-color: #fff4bf"></div>
+        <div>
+          <div class="legend-label">Coldest Functions (<1%)</div>
+          <div class="legend-description">Very low performance impact</div>
+        </div>
+      </div>
+    </div>
+
+    <div class="chart-container">
+      <div id="chart"></div>
+    </div>
+
+    <!-- INLINE_JS -->
+  </body>
+</html>
index 929a92e1dda3b2ddf0a7a8c9e5335a23a4a04dab..8a65f312234730d3aaa9ded4214ae360c824224a 100644 (file)
@@ -12,17 +12,20 @@ from collections import deque
 from _colorize import ANSIColors
 
 from .pstats_collector import PstatsCollector
-from .stack_collector import CollapsedStackCollector
+from .stack_collector import CollapsedStackCollector, FlamegraphCollector
 
 _FREE_THREADED_BUILD = sysconfig.get_config_var("Py_GIL_DISABLED") is not None
-_MAX_STARTUP_ATTEMPTS = 5
-_STARTUP_RETRY_DELAY_SECONDS = 0.1
 _HELP_DESCRIPTION = """Sample a process's stack frames and generate profiling data.
 Supports the following target modes:
   - -p PID: Profile an existing process by PID
   - -m MODULE [ARGS...]: Profile a module as python -m module ...
   - filename [ARGS...]: Profile the specified script by running it in a subprocess
 
+Supports the following output formats:
+  - --pstats: Detailed profiling statistics with sorting options
+  - --collapsed: Stack traces for generating flamegraphs
+  - --flamegraph Interactive HTML flamegraph visualization (requires web browser)
+
 Examples:
   # Profile process 1234 for 10 seconds with default settings
   python -m profiling.sampling -p 1234
@@ -39,6 +42,9 @@ Examples:
   # Generate collapsed stacks for flamegraph
   python -m profiling.sampling --collapsed -p 1234
 
+  # Generate a HTML flamegraph
+  python -m profiling.sampling --flamegraph -p 1234
+
   # Profile all threads, sort by total time
   python -m profiling.sampling -a --sort-tottime -p 1234
 
@@ -185,9 +191,16 @@ class SampleProfiler:
         if self.realtime_stats and len(self.sample_intervals) > 0:
             print()  # Add newline after real-time stats
 
+        sample_rate = num_samples / running_time
+        error_rate = (errors / num_samples) * 100 if num_samples > 0 else 0
+
         print(f"Captured {num_samples} samples in {running_time:.2f} seconds")
-        print(f"Sample rate: {num_samples / running_time:.2f} samples/sec")
-        print(f"Error rate: {(errors / num_samples) * 100:.2f}%")
+        print(f"Sample rate: {sample_rate:.2f} samples/sec")
+        print(f"Error rate: {error_rate:.2f}%")
+
+        # Pass stats to flamegraph collector if it's the right type
+        if hasattr(collector, 'set_stats'):
+            collector.set_stats(self.sample_interval_usec, running_time, sample_rate, error_rate)
 
         expected_samples = int(duration_sec / sample_interval_sec)
         if num_samples < expected_samples:
@@ -596,6 +609,9 @@ def sample(
         case "collapsed":
             collector = CollapsedStackCollector()
             filename = filename or f"collapsed.{pid}.txt"
+        case "flamegraph":
+            collector = FlamegraphCollector()
+            filename = filename or f"flamegraph.{pid}.html"
         case _:
             raise ValueError(f"Invalid output format: {output_format}")
 
@@ -728,12 +744,20 @@ def main():
         dest="format",
         help="Generate collapsed stack traces for flamegraphs",
     )
+    output_format.add_argument(
+        "--flamegraph",
+        action="store_const",
+        const="flamegraph",
+        dest="format",
+        help="Generate HTML flamegraph visualization",
+    )
 
     output_group.add_argument(
         "-o",
         "--outfile",
         help="Save output to a file (if omitted, prints to stdout for pstats, "
-        "or saves to collapsed.<pid>.txt for collapsed format)",
+        "or saves to collapsed.<pid>.txt or flamegraph.<pid>.html for the "
+        "respective output formats)"
     )
 
     # pstats-specific options
index 270b6871980fb8ad3ea0aaf0d70930967f82517f..9df8111c451de83b30ab07bb4685e57971706b52 100644 (file)
@@ -1,4 +1,9 @@
+import base64
 import collections
+import functools
+import importlib.resources
+import json
+import linecache
 import os
 
 from .collector import Collector
@@ -41,3 +46,229 @@ class CollapsedStackCollector(StackTraceCollector):
             for stack, count in stack_counter.items():
                 f.write(f"{stack} {count}\n")
         print(f"Collapsed stack output written to {filename}")
+
+
+class FlamegraphCollector(StackTraceCollector):
+    def __init__(self):
+        super().__init__()
+        self.stats = {}
+
+    def set_stats(self, sample_interval_usec, duration_sec, sample_rate, error_rate=None):
+        """Set profiling statistics to include in flamegraph data."""
+        self.stats = {
+            "sample_interval_usec": sample_interval_usec,
+            "duration_sec": duration_sec,
+            "sample_rate": sample_rate,
+            "error_rate": error_rate
+        }
+
+    def export(self, filename):
+        flamegraph_data = self._convert_to_flamegraph_format()
+
+        # Debug output
+        num_functions = len(flamegraph_data.get("children", []))
+        total_time = flamegraph_data.get("value", 0)
+        print(
+            f"Flamegraph data: {num_functions} root functions, total samples: {total_time}"
+        )
+
+        if num_functions == 0:
+            print(
+                "Warning: No functions found in profiling data. Check if sampling captured any data."
+            )
+            return
+
+        html_content = self._create_flamegraph_html(flamegraph_data)
+
+        with open(filename, "w", encoding="utf-8") as f:
+            f.write(html_content)
+
+        print(f"Flamegraph saved to: {filename}")
+
+    @functools.lru_cache(maxsize=None)
+    def _format_function_name(self, func):
+        filename, lineno, funcname = func
+
+        if len(filename) > 50:
+            parts = filename.split("/")
+            if len(parts) > 2:
+                filename = f".../{'/'.join(parts[-2:])}"
+
+        return f"{funcname} ({filename}:{lineno})"
+
+    def _convert_to_flamegraph_format(self):
+        """Convert call trees to d3-flamegraph format with optimized hierarchy building"""
+        if not self.call_trees:
+            return {"name": "No Data", "value": 0, "children": []}
+
+        unique_functions = set()
+        for call_tree in self.call_trees:
+            unique_functions.update(call_tree)
+
+        func_to_name = {
+            func: self._format_function_name(func) for func in unique_functions
+        }
+
+        root = {"name": "root", "children": {}, "samples": 0}
+
+        for call_tree in self.call_trees:
+            current_node = root
+            current_node["samples"] += 1
+
+            for func in call_tree:
+                func_name = func_to_name[func]  # Use pre-computed name
+
+                if func_name not in current_node["children"]:
+                    current_node["children"][func_name] = {
+                        "name": func_name,
+                        "func": func,
+                        "children": {},
+                        "samples": 0,
+                        "filename": func[0],
+                        "lineno": func[1],
+                        "funcname": func[2],
+                    }
+
+                current_node = current_node["children"][func_name]
+                current_node["samples"] += 1
+
+        def convert_node(node, min_samples=1):
+            if node["samples"] < min_samples:
+                return None
+
+            source_code = None
+            if "func" in node:
+                source_code = self._get_source_lines(node["func"])
+
+            result = {
+                "name": node["name"],
+                "value": node["samples"],
+                "children": [],
+            }
+
+            if "filename" in node:
+                result.update(
+                    {
+                        "filename": node["filename"],
+                        "lineno": node["lineno"],
+                        "funcname": node["funcname"],
+                    }
+                )
+
+            if source_code:
+                result["source"] = source_code
+
+            # Recursively convert children
+            child_nodes = []
+            for child_name, child_node in node["children"].items():
+                child_result = convert_node(child_node, min_samples)
+                if child_result:
+                    child_nodes.append(child_result)
+
+            # Sort children by sample count (descending)
+            child_nodes.sort(key=lambda x: x["value"], reverse=True)
+            result["children"] = child_nodes
+
+            return result
+
+        # Filter out very small functions (less than 0.1% of total samples)
+        total_samples = len(self.call_trees)
+        min_samples = max(1, int(total_samples * 0.001))
+
+        converted_root = convert_node(root, min_samples)
+
+        if not converted_root or not converted_root["children"]:
+            return {"name": "No significant data", "value": 0, "children": []}
+
+        # If we only have one root child, make it the root to avoid redundant level
+        if len(converted_root["children"]) == 1:
+            main_child = converted_root["children"][0]
+            main_child["name"] = f"Program Root: {main_child['name']}"
+            main_child["stats"] = self.stats
+            return main_child
+
+        converted_root["name"] = "Program Root"
+        converted_root["stats"] = self.stats
+        return converted_root
+
+    def _get_source_lines(self, func):
+        filename, lineno, funcname = func
+
+        try:
+            # Get several lines around the function definition
+            lines = []
+            start_line = max(1, lineno - 2)
+            end_line = lineno + 3
+
+            for line_num in range(start_line, end_line):
+                line = linecache.getline(filename, line_num)
+                if line.strip():
+                    marker = "→ " if line_num == lineno else "  "
+                    lines.append(f"{marker}{line_num}: {line.rstrip()}")
+
+            return lines if lines else None
+
+        except Exception:
+            # If we can't get source code, return None
+            return None
+
+    def _create_flamegraph_html(self, data):
+        data_json = json.dumps(data)
+
+        template_dir = importlib.resources.files(__package__)
+        vendor_dir = template_dir / "_vendor"
+        assets_dir = template_dir / "_assets"
+
+        d3_path = vendor_dir / "d3" / "7.8.5" / "d3.min.js"
+        d3_flame_graph_dir = vendor_dir /  "d3-flame-graph" / "4.1.3"
+        fg_css_path = d3_flame_graph_dir / "d3-flamegraph.css"
+        fg_js_path = d3_flame_graph_dir / "d3-flamegraph.min.js"
+        fg_tooltip_js_path = d3_flame_graph_dir / "d3-flamegraph-tooltip.min.js"
+
+        html_template = (template_dir / "flamegraph_template.html").read_text(encoding="utf-8")
+        css_content = (template_dir / "flamegraph.css").read_text(encoding="utf-8")
+        js_content = (template_dir / "flamegraph.js").read_text(encoding="utf-8")
+
+        # Inline first-party CSS/JS
+        html_template = html_template.replace(
+            "<!-- INLINE_CSS -->", f"<style>\n{css_content}\n</style>"
+        )
+        html_template = html_template.replace(
+            "<!-- INLINE_JS -->", f"<script>\n{js_content}\n</script>"
+        )
+
+        png_path = assets_dir / "python-logo-only.png"
+        b64_logo = base64.b64encode(png_path.read_bytes()).decode("ascii")
+
+        # Let CSS control size; keep markup simple
+        logo_html = f'<img src="data:image/png;base64,{b64_logo}" alt="Python logo"/>'
+        html_template = html_template.replace("<!-- INLINE_LOGO -->", logo_html)
+
+        d3_js = d3_path.read_text(encoding="utf-8")
+        fg_css = fg_css_path.read_text(encoding="utf-8")
+        fg_js = fg_js_path.read_text(encoding="utf-8")
+        fg_tooltip_js = fg_tooltip_js_path.read_text(encoding="utf-8")
+
+        html_template = html_template.replace(
+            "<!-- INLINE_VENDOR_D3_JS -->",
+            f"<script>\n{d3_js}\n</script>",
+        )
+        html_template = html_template.replace(
+            "<!-- INLINE_VENDOR_FLAMEGRAPH_CSS -->",
+            f"<style>\n{fg_css}\n</style>",
+        )
+        html_template = html_template.replace(
+            "<!-- INLINE_VENDOR_FLAMEGRAPH_JS -->",
+            f"<script>\n{fg_js}\n</script>",
+        )
+        html_template = html_template.replace(
+            "<!-- INLINE_VENDOR_FLAMEGRAPH_TOOLTIP_JS -->",
+            f"<script>\n{fg_tooltip_js}\n</script>",
+        )
+
+        # Replace the placeholder with actual data
+        html_content = html_template.replace(
+            "{{FLAMEGRAPH_DATA}}", data_json
+        )
+
+        return html_content
index 1f369c50094ca85b70e3cebbdbb6e55e79aaa2cc..84339d46d02f7336d1d63a2f79dc034d875a6f30 100644 (file)
@@ -15,6 +15,7 @@ from unittest import mock
 from profiling.sampling.pstats_collector import PstatsCollector
 from profiling.sampling.stack_collector import (
     CollapsedStackCollector,
+    FlamegraphCollector,
 )
 
 from test.support.os_helper import unlink
@@ -436,6 +437,88 @@ class TestSampleProfilerComponents(unittest.TestCase):
         self.assertIn(stack1_expected, lines)
         self.assertIn(stack2_expected, lines)
 
+    def test_flamegraph_collector_basic(self):
+        """Test basic FlamegraphCollector functionality."""
+        collector = FlamegraphCollector()
+
+        # Test empty state (inherits from StackTraceCollector)
+        self.assertEqual(len(collector.call_trees), 0)
+        self.assertEqual(len(collector.function_samples), 0)
+
+        # Test collecting sample data
+        test_frames = [
+            MockInterpreterInfo(
+                0,
+                [MockThreadInfo(1, [("file.py", 10, "func1"), ("file.py", 20, "func2")])],
+            )
+        ]
+        collector.collect(test_frames)
+
+        # Should store call tree (reversed)
+        self.assertEqual(len(collector.call_trees), 1)
+        expected_tree = [("file.py", 20, "func2"), ("file.py", 10, "func1")]
+        self.assertEqual(collector.call_trees[0], expected_tree)
+
+        # Should count function samples
+        self.assertEqual(
+            collector.function_samples[("file.py", 10, "func1")], 1
+        )
+        self.assertEqual(
+            collector.function_samples[("file.py", 20, "func2")], 1
+        )
+
+    def test_flamegraph_collector_export(self):
+        """Test flamegraph HTML export functionality."""
+        flamegraph_out = tempfile.NamedTemporaryFile(
+            suffix=".html", delete=False
+        )
+        self.addCleanup(close_and_unlink, flamegraph_out)
+
+        collector = FlamegraphCollector()
+
+        # Create some test data (use Interpreter/Thread objects like runtime)
+        test_frames1 = [
+            MockInterpreterInfo(
+                0,
+                [MockThreadInfo(1, [("file.py", 10, "func1"), ("file.py", 20, "func2")])],
+            )
+        ]
+        test_frames2 = [
+            MockInterpreterInfo(
+                0,
+                [MockThreadInfo(1, [("file.py", 10, "func1"), ("file.py", 20, "func2")])],
+            )
+        ]  # Same stack
+        test_frames3 = [
+            MockInterpreterInfo(0, [MockThreadInfo(1, [("other.py", 5, "other_func")])])
+        ]
+
+        collector.collect(test_frames1)
+        collector.collect(test_frames2)
+        collector.collect(test_frames3)
+
+        # Export flamegraph
+        collector.export(flamegraph_out.name)
+
+        # Verify file was created and contains valid data
+        self.assertTrue(os.path.exists(flamegraph_out.name))
+        self.assertGreater(os.path.getsize(flamegraph_out.name), 0)
+
+        # Check file contains HTML content
+        with open(flamegraph_out.name, "r", encoding="utf-8") as f:
+            content = f.read()
+
+        # Should be valid HTML
+        self.assertIn("<!doctype html>", content.lower())
+        self.assertIn("<html", content)
+        self.assertIn("Python Performance Flamegraph", content)
+        self.assertIn("d3-flame-graph", content)
+
+        # Should contain the data
+        self.assertIn('"name":', content)
+        self.assertIn('"value":', content)
+        self.assertIn('"children":', content)
+
     def test_pstats_collector_export(self):
         collector = PstatsCollector(
             sample_interval_usec=1000000
@@ -1824,6 +1907,27 @@ class TestSampleProfilerErrorHandling(unittest.TestCase):
             with self.assertRaises(ProcessLookupError):
                 unwinder.get_stack_trace()
 
+    def test_valid_output_formats(self):
+        """Test that all valid output formats are accepted."""
+        valid_formats = ["pstats", "collapsed", "flamegraph"]
+
+        tempdir = tempfile.TemporaryDirectory(delete=False)
+        self.addCleanup(shutil.rmtree, tempdir.name)
+
+
+        with contextlib.chdir(tempdir.name):
+            for fmt in valid_formats:
+                try:
+                    # This will likely fail with permissions, but the format should be valid
+                    profiling.sampling.sample.sample(
+                        os.getpid(),
+                        duration_sec=0.1,
+                        output_format=fmt,
+                        filename=f"test_{fmt}.out",
+                    )
+                except (OSError, RuntimeError, PermissionError):
+                    # Expected errors - we just want to test format validation
+                    pass
 
 
 class TestSampleProfilerCLI(unittest.TestCase):
index edc6c5aa812e2772f93c37a6d96d3d462d9d5110..34bd4540efb0b865c6c901c8324c273f603e6ccf 100644 (file)
@@ -2566,6 +2566,9 @@ LIBSUBDIRS=       asyncio \
                pathlib \
                profile \
                profiling profiling/sampling profiling/tracing \
+               profiling/sampling/_assets \
+               profiling/sampling/_vendor/d3/7.8.5 \
+               profiling/sampling/_vendor/d3-flame-graph/4.1.3 \
                pydoc_data \
                re \
                site-packages \