Message 304342 - Python tracker

Message304342

Author	vstinner
Recipients	orent, rhettinger, serhiy.storchaka, vstinner
Date	2017-10-13.15:08:41
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1507907321.61.0.213398074469.issue30156@psf.upfronthosting.co.za>
In-reply-to

Content
> Removing this micro-optimization makes attribute access in namedtuple more than 1.5 times slower: > Mean +- std dev: [python.default] 126 ns +- 4 ns -> [python] 200 ns +- 7 ns: 1.58x slower (+58%) I wrote the PR 3985, it's only 20 ns slower (1.3x slower): [ref] 80.4 ns +- 3.3 ns -> [fastcall] 103 ns +- 5 ns: 1.28x slower (+28%) Maybe Python was optimized further in the meanwhile, or the slowdown is higher on your computer?

Content

> Removing this micro-optimization makes attribute access in namedtuple more than 1.5 times slower:
> Mean +- std dev: [python.default] 126 ns +- 4 ns -> [python] 200 ns +- 7 ns: 1.58x slower (+58%)

I wrote the PR 3985, it's only 20 ns slower (1.3x slower):

[ref] 80.4 ns +- 3.3 ns -> [fastcall] 103 ns +- 5 ns: 1.28x slower (+28%)

Maybe Python was optimized further in the meanwhile, or the slowdown is higher on your computer?

History
Date	User	Action	Args
2017-10-13 15:08:41	vstinner	set	recipients: + vstinner, rhettinger, orent, serhiy.storchaka
2017-10-13 15:08:41	vstinner	set	messageid: <1507907321.61.0.213398074469.issue30156@psf.upfronthosting.co.za>
2017-10-13 15:08:41	vstinner	link	issue30156 messages
2017-10-13 15:08:41	vstinner	create