Message 381996 - Python tracker

Message381996

Author	terry.reedy
Recipients	belopolsky, josh.r, meador.inge, pitrou, remi.lapeyre, scoder, serhiy.storchaka, terry.reedy, yselivanov
Date	2020-11-28.12:29:53
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1606566593.28.0.420810640758.issue11107@roundup.psfhosted.org>
In-reply-to

Content
Batuhan Taskaya opened a duplicate issue #42454. Since it includes PR-23496, with some review, and at least as much discussion, I am closing this issue, contrary to normal policy. Worthwhile? Batuhan found about 100000 constant slices in 3200 PyPI packages, and 3-50% speedup. Rémi asked "Couldn't [slices] hash like a tuple (start, stop, step)?" Batuhad used the tuple analogy - hashability and hash depends on components. See PR for details. Josh: the PR defines TYPE_SLICE as ':'.

Content

Batuhan Taskaya opened a duplicate issue #42454.  Since it includes PR-23496, with some review, and at least as much discussion, I am closing this issue, contrary to normal policy.

Worthwhile? Batuhan found about 100000 constant slices in 3200 PyPI packages, and 3-50% speedup.

Rémi asked "Couldn't [slices] hash like a tuple (start, stop, step)?"
Batuhad used the tuple analogy - hashability and hash depends on components.  See PR for details.

Josh: the PR defines TYPE_SLICE as ':'.

History
Date	User	Action	Args
2020-11-28 12:29:53	terry.reedy	set	recipients: + terry.reedy, belopolsky, pitrou, scoder, meador.inge, serhiy.storchaka, yselivanov, josh.r, remi.lapeyre
2020-11-28 12:29:53	terry.reedy	set	messageid: <1606566593.28.0.420810640758.issue11107@roundup.psfhosted.org>
2020-11-28 12:29:53	terry.reedy	link	issue11107 messages
2020-11-28 12:29:53	terry.reedy	create