[Python-Dev] Embedded Python startup is slow

Thomas Heller theller at ctypes.org
Thu Mar 24 16:23:29 CET 2011

Am 24.03.2011 12:18, schrieb "Martin v. Löwis":
>> 1. Is there anything I can do at compile time to tell Python these files
>> don't exist and avoid trying to open them?
> If you disable dynamic loading of extension modules, the number of stat
> calls will go down significantly.
>> 2. Is it possible to make python first try and open the ".pyc" and only
>> then look for ".py" ?
> If you then further reduce sys.path, and zip up the standard library
> .pyc files, you get further reductions.

On my embedded ARM system (400MHz ARM926EJ-S, linux 2.6.38) Python
starts up even slower when the standard library is in a zip-file.
The effect is worse when the zip-file is compressed, but the slow-down
is still there if the zip-file is not compressed.


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