Message 339623 - Python tracker

Message339623

Author	anthony shaw
Recipients	Aaron Hall, anthony shaw, methane, ncoghlan, ronaldoussoren, serhiy.storchaka
Date	2019-04-08.11:47:48
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1554724068.4.0.0519810762817.issue36551@roundup.psfhosted.org>
In-reply-to

Content
> This patch makes it slow for small iterators That is a one-off cost for the __length_hint__ of the range object specifically. Objects with a known length (lists, sets, tuples) would not have that overhead. I can run a more useful set of benchmarks against this. So the +0.6us would be the same for ranges 8-16. Then less for 16-25, then again for 25-35 as the removal of the reallocation process has a more significant factor for larger ranges.

Content

> This patch makes it slow for small iterators

That is a one-off cost for the __length_hint__ of the range object specifically.
Objects with a known length (lists, sets, tuples) would not have that overhead.

I can run a more useful set of benchmarks against this.

So the +0.6us would be the same for ranges 8-16. Then less for 16-25, then again for 25-35 as the removal of the reallocation process has a more significant factor for larger ranges.

History
Date	User	Action	Args
2019-04-08 11:47:48	anthony shaw	set	recipients: + anthony shaw, ronaldoussoren, ncoghlan, methane, serhiy.storchaka, Aaron Hall
2019-04-08 11:47:48	anthony shaw	set	messageid: <1554724068.4.0.0519810762817.issue36551@roundup.psfhosted.org>
2019-04-08 11:47:48	anthony shaw	link	issue36551 messages
2019-04-08 11:47:48	anthony shaw	create