Message 321528 - Python tracker

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Author	methane
Recipients	benjamin.peterson, methane, serhiy.storchaka, vstinner
Date	2018年07月12日.08:34:42
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<CAEfz+TzhtHWf4C+vJmvu0JdZM=t540Mnm1J8MJ=9mUcpknSkqA@mail.gmail.com>
In-reply-to	<1531382569.17.0.56676864532.issue34093@psf.upfronthosting.co.za>

Content
> STINNER Victor <vstinner@redhat.com> added the comment: > > What is the time spent in marshal.dumps() at Python startup when Python has to create all .pyc files? For example "./python -c pass" in the master branch with no external dependency? My question is if the PR makes Python startup 5% slower or less than 1% slower. When startup, Python does more than compile()+marshal.dumps(). And as I wrote above, it makes compile()+marshal.dumps() only 4% slower. So startup must not be slower than 4%. Additionally, it happens only once if pyc can be writable. (I don't know if marshal.dumps() is called when open(cache_path, 'wb') failed)

Content

> STINNER Victor <vstinner@redhat.com> added the comment:
>
> What is the time spent in marshal.dumps() at Python startup when Python has to create all .pyc files? For example "./python -c pass" in the master branch with no external dependency? My question is if the PR makes Python startup 5% slower or less than 1% slower.
When startup, Python does more than compile()+marshal.dumps().
And as I wrote above, it makes compile()+marshal.dumps() only 4% slower.
So startup must not be slower than 4%.
Additionally, it happens only once if pyc can be writable.
(I don't know if marshal.dumps() is called when open(cache_path, 'wb') failed)

History
Date	User	Action	Args
2018年07月12日 08:34:42	methane	set	recipients: + methane, vstinner, benjamin.peterson, serhiy.storchaka
2018年07月12日 08:34:42	methane	link	issue34093 messages
2018年07月12日 08:34:42	methane	create

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