Message 323183 - Python tracker

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Author	methane
Recipients	barry, cykerway, methane, ncoghlan, terry.reedy, vstinner
Date	2018-08-06.08:07:47
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1533542867.92.0.56676864532.issue34296@psf.upfronthosting.co.za>
In-reply-to

Content
> i did 2 implementations in both python and pure bash, python takes about 500ms to run while bash is more than 10 times faster. VM startup + `import site` are done in 10~20ms on common Linux machine. It won't take 500ms. While Python VM startup is not lightning fast, library import time is much slower than VM startup in many cases. And since "importing library" may have many important side effects, we can't "pre warm" it. Have you tried `PYTHONPROFILEIMPORTTIME=1` environment variable added by Python 3.7? https://dev.to/methane/how-to-speed-up-python-application-startup-time-nkf

> i did 2 implementations in both python and pure bash, python takes about 500ms to run while bash is more than 10 times faster.

VM startup + `import site` are done in 10~20ms on common Linux machine.
It won't take 500ms.

While Python VM startup is not lightning fast, library import time is much slower than VM startup in many cases.  And since "importing library" may have many important side effects, we can't "pre warm" it.

Have you tried `PYTHONPROFILEIMPORTTIME=1` environment variable added by Python 3.7?
https://dev.to/methane/how-to-speed-up-python-application-startup-time-nkf

History
Date	User	Action	Args
2018-08-06 08:07:48	methane	set	recipients: + methane, barry, terry.reedy, ncoghlan, vstinner, cykerway
2018-08-06 08:07:47	methane	set	messageid: <1533542867.92.0.56676864532.issue34296@psf.upfronthosting.co.za>
2018-08-06 08:07:47	methane	link	issue34296 messages
2018-08-06 08:07:47	methane	create