Serhiy Storchaka <storch...@gmail.com> added the comment: Thank you, Antoine. It is interesting results, that on 64 bits greatly accelerated the case, which on 32 bits sped up a little. It was the pathology that a 2-byte to UCS1 was decoded in 1.5x slower than a 2-byte to UCS2. Interestingly, a small acceleration for the other cases are random deviations or consequential effect? Strange looks like the difference for ascii-only text, this branch is not affected by the patch. Except that the consequences of global optimization. The deceleration of the decoding of the 4-byte data is expected.
Here is a patch, which is risky reception with signed numbers. For me, it shows the acceleration of a few percent in comparison with the previous patch. But I can not recommend it, it looks too hacker for such a small improvement. It will not work on the exotic platforms where signed numbers are implemented not as complement code (but Python is not supports such platforms). ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue14654> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
