Message 191101 - Python tracker

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In-reply-to
Author	belopolsky
Recipients	belopolsky, cvrebert, eric.araujo, eric.smith, ezio.melotti, lemburg, mark.dickinson, ncoghlan, skrah, vstinner
Date	2013年06月14日.01:43:37
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1371174218.35.0.775547858789.issue10581@psf.upfronthosting.co.za>

Content
PEP 393 implementation has already added the fast path to decimal encoding: http://hg.python.org/cpython/diff/8beaa9a37387/Objects/unicodeobject.c#l1.3735 What we can do, however, is improve performance of converting non-ascii numerals by looking up only the first digit's value and converting the rest using simple: value = code - (first_code - first_value) if not 0 <= value < 10: raise or fall back to UCD lookup

Content

PEP 393 implementation has already added the fast path to decimal encoding:
http://hg.python.org/cpython/diff/8beaa9a37387/Objects/unicodeobject.c#l1.3735
What we can do, however, is improve performance of converting non-ascii numerals by looking up only the first digit's value and converting the rest using simple:
value = code - (first_code - first_value)
if not 0 <= value < 10:
 raise or fall back to UCD lookup

History
Date	User	Action	Args
2013年06月14日 01:43:38	belopolsky	set	recipients: + belopolsky, lemburg, mark.dickinson, ncoghlan, vstinner, eric.smith, ezio.melotti, eric.araujo, cvrebert, skrah
2013年06月14日 01:43:38	belopolsky	set	messageid: <1371174218.35.0.775547858789.issue10581@psf.upfronthosting.co.za>
2013年06月14日 01:43:38	belopolsky	link	issue10581 messages
2013年06月14日 01:43:37	belopolsky	create

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