Serhiy Storchaka <storch...@gmail.com> added the comment:
The patches updated to stylistic conformity of the UTF-8 decoder. Patch B is
significantly accelerated for aligned input data (i. e. almost always),
especially for natural order. The UTF-32 decoder can now be faster than ASCII
decoder! May be it is time to change the title to "Amazingly faster UTF-32
decoding"? ;)
Py3.2 Py3.3 patchA
patchB
utf-32le 'A'*10000 162 (+462%) 100 (+810%) 391
(+133%) 910
utf-32le 'A'*9999+'\x80' 162 (+411%) 99 (+736%) 377
(+120%) 828
utf-32le 'A'*9999+'\u0100' 162 (+277%) 95 (+543%) 324
(+89%) 611
utf-32le 'A'*9999+'\u8000' 162 (+278%) 95 (+545%) 324
(+89%) 613
utf-32le 'A'*9999+'\U00010000' 162 (+280%) 95 (+547%) 322
(+91%) 615
utf-32le '\x80'*10000 162 (+436%) 94 (+823%) 389
(+123%) 868
utf-32le '\x80'+'A'*9999 162 (+441%) 94 (+832%) 388
(+126%) 876
utf-32le '\x80'*9999+'\u0100' 162 (+273%) 90 (+571%) 320
(+89%) 604
utf-32le '\x80'*9999+'\u8000' 162 (+271%) 90 (+568%) 319
(+88%) 601
utf-32le '\x80'*9999+'\U00010000' 162 (+268%) 90 (+562%) 318
(+87%) 596
utf-32le '\u0100'*10000 161 (+445%) 83 (+958%) 405
(+117%) 878
utf-32le '\u0100'+'A'*9999 162 (+440%) 83 (+954%) 403
(+117%) 875
utf-32le '\u0100'+'\x80'*9999 162 (+444%) 83 (+963%) 403
(+119%) 882
utf-32le '\u0100'*9999+'\u8000' 162 (+441%) 83 (+955%) 404
(+117%) 876
utf-32le '\u0100'*9999+'\U00010000' 162 (+259%) 79 (+637%) 325
(+79%) 582
utf-32le '\u8000'*10000 162 (+441%) 83 (+955%) 404
(+117%) 876
utf-32le '\u8000'+'A'*9999 162 (+441%) 83 (+955%) 404
(+117%) 876
utf-32le '\u8000'+'\x80'*9999 161 (+448%) 83 (+964%) 403
(+119%) 883
utf-32le '\u8000'+'\u0100'*9999 161 (+443%) 83 (+954%) 402
(+118%) 875
utf-32le '\u8000'*9999+'\U00010000' 162 (+262%) 79 (+643%) 325
(+81%) 587
utf-32le '\U00010000'*10000 149 (+483%) 83 (+947%) 390
(+123%) 869
utf-32le '\U00010000'+'A'*9999 162 (+444%) 83 (+963%) 389
(+127%) 882
utf-32le '\U00010000'+'\x80'*9999 162 (+430%) 83 (+935%) 389
(+121%) 859
utf-32le '\U00010000'+'\u0100'*9999 162 (+429%) 83 (+933%) 389
(+120%) 857
utf-32le '\U00010000'+'\u8000'*9999 162 (+431%) 83 (+937%) 388
(+122%) 861
utf-32be 'A'*10000 162 (+199%) 100 (+384%) 393
(+23%) 484
utf-32be 'A'*9999+'\x80' 162 (+186%) 99 (+368%) 376
(+23%) 463
utf-32be 'A'*9999+'\u0100' 162 (+138%) 95 (+306%) 323
(+20%) 386
utf-32be 'A'*9999+'\u8000' 162 (+139%) 95 (+307%) 323
(+20%) 387
utf-32be 'A'*9999+'\U00010000' 162 (+138%) 95 (+305%) 322
(+20%) 385
utf-32be '\x80'*10000 161 (+196%) 94 (+407%) 389
(+23%) 477
utf-32be '\x80'+'A'*9999 161 (+197%) 94 (+409%) 387
(+24%) 478
utf-32be '\x80'*9999+'\u0100' 161 (+137%) 90 (+324%) 321
(+19%) 382
utf-32be '\x80'*9999+'\u8000' 162 (+135%) 89 (+328%) 320
(+19%) 381
utf-32be '\x80'*9999+'\U00010000' 162 (+134%) 89 (+326%) 318
(+19%) 379
utf-32be '\u0100'*10000 161 (+196%) 83 (+473%) 404
(+18%) 476
utf-32be '\u0100'+'A'*9999 161 (+196%) 83 (+475%) 402
(+19%) 477
utf-32be '\u0100'+'\x80'*9999 162 (+196%) 83 (+477%) 403
(+19%) 479
utf-32be '\u0100'*9999+'\u8000' 161 (+196%) 83 (+473%) 404
(+18%) 476
utf-32be '\u0100'*9999+'\U00010000' 162 (+131%) 79 (+373%) 325
(+15%) 374
utf-32be '\u8000'*10000 161 (+195%) 83 (+472%) 404
(+18%) 475
utf-32be '\u8000'+'A'*9999 161 (+197%) 83 (+476%) 402
(+19%) 478
utf-32be '\u8000'+'\x80'*9999 161 (+197%) 83 (+476%) 403
(+19%) 478
utf-32be '\u8000'+'\u0100'*9999 162 (+194%) 83 (+473%) 403
(+18%) 476
utf-32be '\u8000'*9999+'\U00010000' 161 (+133%) 79 (+375%) 325
(+15%) 375
utf-32be '\U00010000'*10000 148 (+222%) 83 (+473%) 391
(+22%) 476
utf-32be '\U00010000'+'A'*9999 161 (+198%) 83 (+477%) 389
(+23%) 479
utf-32be '\U00010000'+'\x80'*9999 162 (+194%) 83 (+473%) 389
(+22%) 476
utf-32be '\U00010000'+'\u0100'*9999 162 (+194%) 83 (+475%) 389
(+23%) 477
utf-32be '\U00010000'+'\u8000'*9999 161 (+196%) 83 (+475%) 389
(+23%) 477
----------
Added file: http://bugs.python.org/file25537/decode_utf32_a_2.patch
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<http://bugs.python.org/issue14625>
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