Message 361057 - Python tracker

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Author	vstinner
Recipients	corona10, mark.dickinson, vstinner
Date	2020-01-30.13:49:21
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1580392161.21.0.199766544826.issue39434@roundup.psfhosted.org>
In-reply-to

Content
Thanks, that's a nice optimization! I'm surprised that creating a tuple of 2 items, get one item directly into the C structure, and destroy the tuple is so slow (360 ns => 185 ns: 175 ns less). With my FASTCALL optimization on function calls, I recall that avoiding the creation a tuple of N items made function calls around 20 ns faster. Not 175 ns.

Thanks, that's a nice optimization!

I'm surprised that creating a tuple of 2 items, get one item  directly into the C structure, and destroy the tuple is so slow (360 ns => 185 ns: 175 ns less). With my FASTCALL optimization on function calls, I recall that avoiding the creation a tuple of N items made function calls around 20 ns faster. Not 175 ns.

History
Date	User	Action	Args
2020-01-30 13:49:21	vstinner	set	recipients: + vstinner, mark.dickinson, corona10
2020-01-30 13:49:21	vstinner	set	messageid: <1580392161.21.0.199766544826.issue39434@roundup.psfhosted.org>
2020-01-30 13:49:21	vstinner	link	issue39434 messages
2020-01-30 13:49:21	vstinner	create