Antoine Pitrou <pit...@free.fr> added the comment:
The work to rewrite the IO stack in C will solve this problem as it will
probably solve most performance-related IO problems in py3k.
Amaury and I have been progressing a lot, the rewrite is now a real
branch in SVN at branches/io-c/. On this very issue, it is only 30%
slower than 2.x, which is quite good given the layered nature of the IO
stack and the fact that text IO does a lot more than in 2.x (it
translates newlines and encodes the text).
(actually, if I add an explicit .encode('utf8') call to the 2.x version
of the script, it becomes slower than our io-c rewrite)
----------
components: +Extension Modules, Library (Lib) -Interpreter Core
stage: -> needs patch
title: io write() performance very slow -> Rewrite the IO stack in C
versions: +Python 3.1 -Python 3.0
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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue4565>
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