Message 57875 - Python tracker

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In-reply-to
Author	amaury.forgeotdarc
Recipients	amaury.forgeotdarc, georg.brandl, ggenellina, inducer, rhettinger, tim.peters
Date	2007年11月27日.18:04:16
SpamBayes Score	0.027452681
Marked as misclassified	No
Message-id	<1196186657.6.0.698765727839.issue1045@psf.upfronthosting.co.za>

Content
The slowdown is due to the new function _PyObject_LengthHint: on my Win2K machine, the command python -m timeit "tuple(1 for _ in xrange(3))" answers: 100000 loops, best of 3: 4.14 usec per loop By adding a line "return rv;" on the second line of _PyObject_LengthHint, I get: 100000 loops, best of 3: 2.71 usec per loop Should we disable this function for some known built-in types?

Content

The slowdown is due to the new function _PyObject_LengthHint: on my
Win2K machine, 
the command
 python -m timeit "tuple(1 for _ in xrange(3))"
answers:
 100000 loops, best of 3: 4.14 usec per loop
By adding a line "return rv;" on the second line of
_PyObject_LengthHint, I get:
 100000 loops, best of 3: 2.71 usec per loop
Should we disable this function for some known built-in types?

History
Date	User	Action	Args
2007年11月27日 18:04:18	amaury.forgeotdarc	set	spambayes_score: 0.0274527 -> 0.027452681 recipients: + amaury.forgeotdarc, tim.peters, georg.brandl, rhettinger, ggenellina, inducer
2007年11月27日 18:04:18	amaury.forgeotdarc	set	spambayes_score: 0.0274527 -> 0.0274527 messageid: <1196186657.6.0.698765727839.issue1045@psf.upfronthosting.co.za>
2007年11月27日 18:04:17	amaury.forgeotdarc	link	issue1045 messages
2007年11月27日 18:04:17	amaury.forgeotdarc	create

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