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Thu Oct 25 11:49:57 CEST 2012 · https://mail.python.org/pipermail/python-dev/2012-October/122402.html

On 25.10.12 12:18, Maciej Fijalkowski wrote:
> I challenge you to find a benchmark that is being significantly
> affected (>15%) with the split proposed by Victor. It does not even
> have to be a real-world one, although that would definitely buy it
> more credibility.

I see 10% slowdown for UTF-8 decoding for UCS2 strings, but 10% speedup 
for mostly-BMP UCS4 strings.  For encoding the situation is reversed 
(but up to +27%).  Charmap decoding speedups 10-30%.

GCC 4.4.3, 32-bit Linux.

https://bitbucket.org/storchaka/cpython-stuff/src/default/bench

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[Python-Dev] Split unicodeobject.c into subfiles