Message 181743 - Python tracker

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In-reply-to
Author	gvanrossum
Recipients	gvanrossum, pitrou
Date	2013年02月09日.16:18:55
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1360426735.71.0.83429366739.issue17170@psf.upfronthosting.co.za>

Content
Hm, you seem to be right. Changing the bug title. So, can we speed up method lookup? It's a shame that I have to start promoting this ugly idiom. There's a similar issue where s[:5]=='abcde' is faster than s.startswith('abcde'): ./python.exe -m timeit -s "a = 'hundred'" "a.startswith('foo')" 1000000 loops, best of 3: 0.281 usec per loop ./python.exe -m timeit -s "a = 'hundred'" "a[:3] == 'foo'" 10000000 loops, best of 3: 0.158 usec per loop

Content

Hm, you seem to be right. Changing the bug title.
So, can we speed up method lookup? It's a shame that I have to start promoting this ugly idiom. There's a similar issue where s[:5]=='abcde' is faster than s.startswith('abcde'):
./python.exe -m timeit -s "a = 'hundred'" "a.startswith('foo')"
1000000 loops, best of 3: 0.281 usec per loop
./python.exe -m timeit -s "a = 'hundred'" "a[:3] == 'foo'"
10000000 loops, best of 3: 0.158 usec per loop

History
Date	User	Action	Args
2013年02月09日 16:18:55	gvanrossum	set	recipients: + gvanrossum, pitrou
2013年02月09日 16:18:55	gvanrossum	set	messageid: <1360426735.71.0.83429366739.issue17170@psf.upfronthosting.co.za>
2013年02月09日 16:18:55	gvanrossum	link	issue17170 messages
2013年02月09日 16:18:55	gvanrossum	create

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