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[Python-Dev] Python startup time

Cesare Di Mauro cesare.di.mauro at gmail.com
Thu Jul 20 15:38:23 EDT 2017 
2017-07-20 19:23 GMT+02:00 Victor Stinner <victor.stinner at gmail.com>:

> 2017-07-20 19:09 GMT+02:00 Cesare Di Mauro <cesare.di.mauro at gmail.com>:
> > I assume that Python loads compiled (.pyc and/or .pyo) from the stdlib.
> That's something that also influences the startup time (compiling source vs
> loading pre-compiled modules).
>
> My benchmark was "python3 -m perf command -- python3 -c pass": I don't
> explicitly remove .pyc files, I expect that Python uses prebuilt .pyc
> files from __pycache__.
>
> Victor
>

OK, that should be the best case.

An idea to improve the situation might be to find an alternative structure
for .pyc/pyo files, which allows to (partially) "parallelize" their loading
(not execution, of course), or at least speed-up the process. Maybe a GSoC
project for some student, if no core dev has time to investigate it.

Cesare

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