[Python-Dev] To reduce Python "application" startup time

[Nathaniel Smith]

On Tue, Sep 5, 2017 at 11:13 AM, Jelle Zijlstra
<jelle.zijlstra at gmail.com> wrote:
>
>
> 2017-09-05 6:02 GMT-07:00 INADA Naoki <songofacandy at gmail.com>:
>> With this profile, I tried optimize `python -c 'import asyncio'`, logging
>> and http.client.
>>
>>
>> https://gist.github.com/methane/1ab97181e74a33592314c7619bf34233#file-0-optimize-import-patch
>>
> This patch moves a few imports inside functions. I wonder whether that kind
> of change actually helps with real applications—doesn't any real application
> end up importing the socket module anyway at some point?

I don't know if this particular change is worthwhile, but one place
where startup slowness is particularly noticed is with commands like
'foo.py --help' or 'foo.py --generate-completions' (the latter called
implicitly by hitting <tab> in some shell), which typically do lots of
imports that end up not being used.

-n

-- 
Nathaniel J. Smith -- https://vorpus.org