From: drh <drh@noemail.net>
Date: Wed, 17 Sep 2014 23:37:38 +0000 (+0000)
Subject: Performance improvement and slight size reduction to the comparison operators
X-Git-Tag: version-3.8.7~107^2~1
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=ca5506bdc482bbfde2fe3dd6a93f079e9801ce60;p=thirdparty%2Fsqlite.git

Performance improvement and slight size reduction to the comparison operators
in the VDBE.

FossilOrigin-Name: 14052a7d088bed8196d90a3361ce717a5193bdc8
---

diff --git a/manifest b/manifest
index 369f641908..12094ebf72 100644
--- a/manifest
+++ b/manifest
@@ -1,5 +1,5 @@
-C In\sthe\sMem\sobject,\sstop\srequiring\sthat\sMem.xDel\sbe\sNULL\swhen\sthe\sMEM_Dyn\nbit\sis\sclear.\s\sAlso\sreduce\sthe\samount\sof\sinitialization\sof\sMem\sobjects.\nAll\sfor\sa\ssmall\ssize\sreduction\sand\sperformance\sincrease.
-D 2014-09-17T16:41:15.094
+C Performance\simprovement\sand\sslight\ssize\sreduction\sto\sthe\scomparison\soperators\nin\sthe\sVDBE.
+D 2014-09-17T23:37:39.000
 F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
 F Makefile.in cf57f673d77606ab0f2d9627ca52a9ba1464146a
 F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
@@ -288,7 +288,7 @@ F src/update.c 729f6f18fc27740591d085e1172cebe311144bf0
 F src/utf.c 8f634b93d41c089029dd503161a7d3e685d59a9c
 F src/util.c 4006c01772bd8d8ac4306d523bbcee41d3e392d8
 F src/vacuum.c 59f03f92bcff57faa6a8ca256eb29ccddfb0614a
-F src/vdbe.c d3c548ad4ea6a5549d2d0b502070e0523023ff97
+F src/vdbe.c 78606777e4ce5dba147ab75e71c0127b0d8d4c3d
 F src/vdbe.h 09f5b4e3719fa454f252322b1cdab5cf1f361327
 F src/vdbeInt.h f90b0de6153f50de630a5a113537efb47083812f
 F src/vdbeapi.c c6e63f913bcb12977731a8b12e7e5c5762981527
@@ -1198,7 +1198,7 @@ F tool/vdbe_profile.tcl 67746953071a9f8f2f668b73fe899074e2c6d8c1
 F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
 F tool/warnings.sh 0abfd78ceb09b7f7c27c688c8e3fe93268a13b32
 F tool/win/sqlite.vsix deb315d026cc8400325c5863eef847784a219a2f
-P 4e437844322cc20eef92928b53fa6b37eded586e
-R 8244691fd19236cfb5e445e4012669fa
+P fdddb477c89dabb9f7bf2d5ccb32534868df3a03
+R 27b98108123b0758f30cbbc4e2693ca1
 U drh
-Z ef23a1637c5e3046b6cead80453b022e
+Z 7dd9c2f8b2084fea7b27f362515d2b5a
diff --git a/manifest.uuid b/manifest.uuid
index 2cf0d22ed7..2a5acf5d23 100644
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-fdddb477c89dabb9f7bf2d5ccb32534868df3a03
\ No newline at end of file
+14052a7d088bed8196d90a3361ce717a5193bdc8
\ No newline at end of file
diff --git a/src/vdbe.c b/src/vdbe.c
index 5ab14c5cbf..f964a73878 100644
--- a/src/vdbe.c
+++ b/src/vdbe.c
@@ -1911,8 +1911,14 @@ case OP_Ge: {             /* same as TK_GE, jump, in1, in3 */
     }
 
     assert( pOp->p4type==P4_COLLSEQ || pOp->p4.pColl==0 );
-    ExpandBlob(pIn1);
-    ExpandBlob(pIn3);
+    if( pIn1->flags & MEM_Zero ){
+      sqlite3VdbeMemExpandBlob(pIn1);
+      flags1 &= ~MEM_Zero;
+    }
+    if( pIn3->flags & MEM_Zero ){
+      sqlite3VdbeMemExpandBlob(pIn3);
+      flags3 &= ~MEM_Zero;
+    }
     res = sqlite3MemCompare(pIn3, pIn1, pOp->p4.pColl);
   }
   switch( pOp->opcode ){
@@ -1937,8 +1943,8 @@ case OP_Ge: {             /* same as TK_GE, jump, in1, in3 */
     }
   }
   /* Undo any changes made by applyAffinity() to the input registers. */
-  pIn1->flags = (pIn1->flags&~MEM_TypeMask) | (flags1&MEM_TypeMask);
-  pIn3->flags = (pIn3->flags&~MEM_TypeMask) | (flags3&MEM_TypeMask);
+  pIn1->flags = flags1;
+  pIn3->flags = flags3;
   break;
 }