Message 294839 - Python tracker

Message294839

Author	serhiy.storchaka
Recipients	pitrou, serhiy.storchaka, vstinner
Date	2017-05-31.12:24:41
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1496233481.59.0.113112259714.issue30509@psf.upfronthosting.co.za>
In-reply-to

Content
Sorry, wrong data. PR 1883 makes indexing 1.2 times faster, PR 1861 makes it 1.7 times faster $ ./python -m perf timeit -s 'class A:' -s ' def __getitem__(s, i): return t[i]' -s 'a = A(); t = tuple(range(1000))' --duplicate 100 'list(a)' Unpatched: Mean +- std dev: 498 us +- 26 us PR 1883: Mean +- std dev: 351 us +- 10 us PR 1861: Mean +- std dev: 288 us +- 7 us

Content

Sorry, wrong data. PR 1883 makes indexing 1.2 times faster, PR 1861 makes it 1.7 times faster

$ ./python -m perf timeit -s 'class A:' -s '  def __getitem__(s, i): return t[i]' -s 'a = A(); t = tuple(range(1000))' --duplicate 100 'list(a)'

Unpatched:  Mean +- std dev: 498 us +- 26 us
PR 1883:    Mean +- std dev: 351 us +- 10 us
PR 1861:    Mean +- std dev: 288 us +- 7 us

History
Date	User	Action	Args
2017-05-31 12:24:41	serhiy.storchaka	set	recipients: + serhiy.storchaka, pitrou, vstinner
2017-05-31 12:24:41	serhiy.storchaka	set	messageid: <1496233481.59.0.113112259714.issue30509@psf.upfronthosting.co.za>
2017-05-31 12:24:41	serhiy.storchaka	link	issue30509 messages
2017-05-31 12:24:41	serhiy.storchaka	create