From: dgpb <3577712+dg-pb@users.noreply.github.com>
Date: Thu, 20 Mar 2025 22:07:28 +0000 (+0200)
Subject: gh-131435: random.randint optimization (gh-131436)
X-Git-Tag: v3.14.0a7~269
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=c83efa7a66e30276c328fa4a5f8f8d26977f3e1c;p=thirdparty%2FPython%2Fcpython.git

gh-131435: random.randint optimization (gh-131436)
---

diff --git a/Lib/random.py b/Lib/random.py
index 4d9a047b0279..d6f5337d40f6 100644
--- a/Lib/random.py
+++ b/Lib/random.py
@@ -336,8 +336,11 @@ class Random(_random.Random):
     def randint(self, a, b):
         """Return random integer in range [a, b], including both end points.
         """
-
-        return self.randrange(a, b+1)
+        a = _index(a)
+        b = _index(b)
+        if b < a:
+            raise ValueError(f"empty range in randint({a}, {b})")
+        return a + self._randbelow(b - a + 1)
 
 
     ## -------------------- sequence methods  -------------------
diff --git a/Misc/NEWS.d/next/Library/2025-03-19-20-37-07.gh-issue-131435.y8KMae.rst b/Misc/NEWS.d/next/Library/2025-03-19-20-37-07.gh-issue-131435.y8KMae.rst
new file mode 100644
index 000000000000..1a9810a8fed7
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2025-03-19-20-37-07.gh-issue-131435.y8KMae.rst
@@ -0,0 +1 @@
+10-20% performance improvement of :func:`random.randint`.