Message 64383 - Python tracker

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In-reply-to
Author	pitrou
Recipients	pitrou
Date	2008年03月23日.23:02:37
SpamBayes Score	0.3110036
Marked as misclassified	No
Message-id	<1206313362.45.0.0209255411774.issue2459@psf.upfronthosting.co.za>

Content
loops4.patch adds a mechanism to avoid blocking signal catching in empty loops (such as "for x in it: pass" or "while x: pass"). Much of the speedup is still retained. ./python -m timeit "for x in xrange(10000): pass" Before: 1000 loops, best of 3: 737 usec per loop After: 1000 loops, best of 3: 438 usec per loop ./python -m timeit "x=100" "while x: x -= 1" Before: 10000 loops, best of 3: 21.7 usec per loop After: 100000 loops, best of 3: 16.6 usec per loop ./python Tools/pybench/pybench.py -t ForLoops Before: 364ms per round After: 242ms per round

Content

loops4.patch adds a mechanism to avoid blocking signal catching in empty
loops (such as "for x in it: pass" or "while x: pass"). Much of the
speedup is still retained.
./python -m timeit "for x in xrange(10000): pass"
Before: 1000 loops, best of 3: 737 usec per loop
After: 1000 loops, best of 3: 438 usec per loop
./python -m timeit "x=100" "while x: x -= 1"
Before: 10000 loops, best of 3: 21.7 usec per loop
After: 100000 loops, best of 3: 16.6 usec per loop
./python Tools/pybench/pybench.py -t ForLoops
Before: 364ms per round
After: 242ms per round

History
Date	User	Action	Args
2008年03月23日 23:02:42	pitrou	set	spambayes_score: 0.311004 -> 0.3110036 recipients: + pitrou
2008年03月23日 23:02:42	pitrou	set	spambayes_score: 0.311004 -> 0.311004 messageid: <1206313362.45.0.0209255411774.issue2459@psf.upfronthosting.co.za>
2008年03月23日 23:02:41	pitrou	link	issue2459 messages
2008年03月23日 23:02:41	pitrou	create

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