Serhiy Storchaka <storch...@gmail.com> added the comment:
Here are the benchmark results (numbers are speed, MB/s).
On 32-bit Linux, AMD Athlon 64 X2:
vanilla patched
utf-8 'A'*10000 2016 (+5%) 2111
utf-8 '\x80'*10000 383 (+9%) 416
utf-8 '\x80'+'A'*9999 1283 (+1%) 1301
utf-8 '\u0100'*10000 383 (-8%) 354
utf-8 '\u0100'+'A'*9999 1258 (-6%) 1184
utf-8 '\u0100'+'\x80'*9999 383 (-8%) 354
utf-8 '\u8000'*10000 434 (-11%) 388
utf-8 '\u8000'+'A'*9999 1262 (-6%) 1180
utf-8 '\u8000'+'\x80'*9999 383 (-8%) 354
utf-8 '\u8000'+'\u0100'*9999 383 (-8%) 354
utf-8 '\U00010000'*10000 358 (+1%) 361
utf-8 '\U00010000'+'A'*9999 1168 (-5%) 1104
utf-8 '\U00010000'+'\x80'*9999 382 (-20%) 307
utf-8 '\U00010000'+'\u0100'*9999 382 (-20%) 307
utf-8 '\U00010000'+'\u8000'*9999 404 (-10%) 365
On 32-bit Linux, Intel Atom N570:
vanilla patched
ascii 'A'*10000 789 (+1%) 800
latin1 'A'*10000 796 (-2%) 781
latin1 'A'*9999+'\x80' 779 (+1%) 789
latin1 '\x80'*10000 1739 (-3%) 1690
latin1 '\x80'+'A'*9999 1747 (+1%) 1773
utf-8 'A'*10000 623 (+1%) 631
utf-8 '\x80'*10000 145 (+14%) 165
utf-8 '\x80'+'A'*9999 354 (+1%) 358
utf-8 '\u0100'*10000 164 (-5%) 156
utf-8 '\u0100'+'A'*9999 343 (+2%) 350
utf-8 '\u0100'+'\x80'*9999 164 (-4%) 157
utf-8 '\u8000'*10000 175 (-5%) 166
utf-8 '\u8000'+'A'*9999 349 (+2%) 356
utf-8 '\u8000'+'\x80'*9999 164 (-4%) 157
utf-8 '\u8000'+'\u0100'*9999 164 (-4%) 157
utf-8 '\U00010000'*10000 152 (+7%) 163
utf-8 '\U00010000'+'A'*9999 313 (+6%) 332
utf-8 '\U00010000'+'\x80'*9999 161 (-13%) 140
utf-8 '\U00010000'+'\u0100'*9999 161 (-14%) 139
utf-8 '\U00010000'+'\u8000'*9999 160 (-1%) 159
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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue8271>
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