Message 185970 - Python tracker

Message185970

Author	vstinner
Recipients	pitrou, serhiy.storchaka, vstinner
Date	2013-04-03.22:10:32
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1365027033.17.0.0119638159655.issue17628@psf.upfronthosting.co.za>
In-reply-to

Content
benchmark2: Results on a slower computer. Comparing equal strings is much faster with the patch. Example: equal, 'A', 1000000 \| 945 us (*) \| 1.25 ms (+32%) I don't understand why the patch makes the comparaison much slower, since most time is supposed to be spend in memcmp()? Is it because I starts at the second character to compare strings, instead of the first character? Memory alignment issue?

Content

benchmark2: Results on a slower computer. Comparing equal strings is much faster with the patch. Example:

equal, 'A', 1000000          |  945 us (*) | 1.25 ms (+32%)

I don't understand why the patch makes the comparaison much slower, since most time is supposed to be spend in memcmp()?

Is it because I starts at the second character to compare strings, instead of the first character? Memory alignment issue?

History
Date	User	Action	Args
2013-04-03 22:10:33	vstinner	set	recipients: + vstinner, pitrou, serhiy.storchaka
2013-04-03 22:10:33	vstinner	set	messageid: <1365027033.17.0.0119638159655.issue17628@psf.upfronthosting.co.za>
2013-04-03 22:10:33	vstinner	link	issue17628 messages
2013-04-03 22:10:33	vstinner	create