[issue11051] Improve Python 3.3 startup time

[Florent Xicluna]

Changes by Florent Xicluna :


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nosy: +flox

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[issue11051] Improve Python 3.3 startup time

[Antoine Pitrou]

Antoine Pitrou  added the comment:

This is out of date now that importlib is the default import system.

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resolution:  -> out of date
status: open -> closed

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[issue11051] Improve Python 3.3 startup time

[STINNER Victor]

STINNER Victor  added the comment:

I opened the issue #14057 for the sysconfig parser.

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[issue11051] Improve Python 3.3 startup time

[STINNER Victor]

STINNER Victor  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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[issue11051] Improve Python 3.3 startup time

[STINNER Victor]

STINNER Victor  added the comment:

I changed the title of the issue because what matters is the total startup 
time, not how it is improved :-)

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title: system calls per import -> Improve Python 3.3 startup time

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