Message 145192 - Python tracker

Message145192

Author	pitrou
Recipients	pitrou
Date	2011-10-08.22:18:30
SpamBayes Score	0.00039550423
Marked as misclassified	No
Message-id	<1318112311.49.0.66949742663.issue13136@psf.upfronthosting.co.za>
In-reply-to

Content
This patch speeds up _PyUnicode_CONVERT_BYTES by unrolling its loop. Example micro-benchmark: ./python -m timeit -s "a='x'10000;b='\u0102'1000;c='\U00100000'" "a+b+c" -> before: 100000 loops, best of 3: 14.9 usec per loop -> after: 100000 loops, best of 3: 9.19 usec per loop

Content

This patch speeds up _PyUnicode_CONVERT_BYTES by unrolling its loop.

Example micro-benchmark:

./python -m timeit -s "a='x'*10000;b='\u0102'*1000;c='\U00100000'" "a+b+c"

-> before:
100000 loops, best of 3: 14.9 usec per loop
-> after:
100000 loops, best of 3: 9.19 usec per loop

History
Date	User	Action	Args
2011-10-08 22:18:31	pitrou	set	recipients: + pitrou
2011-10-08 22:18:31	pitrou	set	messageid: <1318112311.49.0.66949742663.issue13136@psf.upfronthosting.co.za>
2011-10-08 22:18:30	pitrou	link	issue13136 messages
2011-10-08 22:18:30	pitrou	create