Message 280271 - Python tracker

➜

This issue tracker has been migrated to GitHub, and is currently read-only.
For more information, see the GitHub FAQs in the Python's Developer Guide.

Author	vstinner
Recipients	ethan.furman, gvanrossum, ned.deily, python-dev, vstinner
Date	2016-11-08.01:18:13
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1478567894.55.0.739658487625.issue28637@psf.upfronthosting.co.za>
In-reply-to

Content
Hum strange, the changeset d903a243c281 (the revert) optimized regex_compile: 480 ms (rev 573bc1f9900e) => 403 ms (rev cf7711887b4a). But it didn't restore python_startup performance: 26.ms (rev 573bc1f9900e) => 24.6 ms (rev cf7711887b4a). Another change made re import slower: revision 88110cfbf4dc of issue #28193. If I also revert this change locally, python_startup performance is restored to 19.6 ms. By the way, regex_compile performance is the same with and without the revision 88110cfbf4dc, but the benchmark purges the re cache at each iteration of the benchmark.

Hum strange, the changeset d903a243c281 (the revert) optimized regex_compile: 480 ms (rev 573bc1f9900e) => 403 ms (rev cf7711887b4a).

But it didn't restore python_startup performance: 26.ms (rev 573bc1f9900e) => 24.6 ms (rev cf7711887b4a).

Another change made re import slower: revision 88110cfbf4dc of issue #28193. If I also revert this change locally, python_startup performance is restored to 19.6 ms.

By the way, regex_compile performance is the same with and without the revision 88110cfbf4dc, but the benchmark purges the re cache at each iteration of the benchmark.

History
Date	User	Action	Args
2016-11-08 01:18:14	vstinner	set	recipients: + vstinner, gvanrossum, ned.deily, ethan.furman, python-dev
2016-11-08 01:18:14	vstinner	set	messageid: <1478567894.55.0.739658487625.issue28637@psf.upfronthosting.co.za>
2016-11-08 01:18:14	vstinner	link	issue28637 messages
2016-11-08 01:18:13	vstinner	create