[issue11051] Improve Python 3.3 startup time

[STINNER Victor]

STINNER Victor <victor.stinner at gmail.com> added the comment:

Using the following patch, "./python -s -c pass" is 2x faster than without the patch!

diff --git a/Lib/site.py b/Lib/site.py
--- a/Lib/site.py
+++ b/Lib/site.py
@@ -518,7 +518,8 @@ def main():
     known_paths = removeduppaths()
     if ENABLE_USER_SITE is None:
         ENABLE_USER_SITE = check_enableusersite()
-    known_paths = addusersitepackages(known_paths)
+    if ENABLE_USER_SITE:
+        known_paths = addusersitepackages(known_paths)
     known_paths = addsitepackages(known_paths)
     if sys.platform == 'os2emx':
         setBEGINLIBPATH()

-s with the patch doesn't import the sysconfig module. So if we want to speed up Python, the first step is to optimize it, at least the function getting the user site packages directory.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue11051>
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