[issue4565] Rewrite the IO stack in C

[Antoine Pitrou]

Antoine Pitrou <pitrou at 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)

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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 <report at bugs.python.org>
<http://bugs.python.org/issue4565>
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