New submission from Antoine Pitrou <pit...@free.fr>:

PEP 393 and the need for a two-pass decoding process has made utf-8 decoding 
much slower, especially with the current generic implementation. Attached patch 
makes utf-8 more than twice faster, which means we're around 10-20% slower than 
3.2 on non-trivial cases.

----------
components: Interpreter Core
files: utf8lib2.patch
keywords: patch
messages: 147778
nosy: haypo, pitrou
priority: normal
severity: normal
stage: patch review
status: open
title: faster utf-8 decoding
type: performance
versions: Python 3.3
Added file: http://bugs.python.org/file23712/utf8lib2.patch

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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue13417>
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