Message157614
| Author |
skrah |
| Recipients |
benjamin.peterson, pitrou, python-dev, serhiy.storchaka, skrah, vstinner |
| Date |
2012年04月05日.20:03:55 |
| SpamBayes Score |
-1.0 |
| Marked as misclassified |
Yes |
| Message-id |
<20120405200355.GA19303@sleipnir.bytereef.org> |
| In-reply-to |
<1333655183.56.0.678322448275.issue14249@psf.upfronthosting.co.za> |
| Content |
On 64-bit Linux with gcc-4.4 I get:
Unpatched:
$ ./python -m timeit -s 'import codecs; d = codecs.utf_16_be_decode; x = (" " * 1000).encode("utf-16be")' 'd(x)'
100000 loops, best of 3: 4.1 usec per loop
$ ./python -m timeit -s 'import codecs; d = codecs.utf_16_be_decode; x = ("\u263A" * 1000).encode("utf-16be")' 'd(x)'
100000 loops, best of 3: 5.87 usec per loop
2c514c382a2a:
$ ./python -m timeit -s 'import codecs; d = codecs.utf_16_be_decode; x = (" " * 1000).encode("utf-16be")' 'd(x)'
100000 loops, best of 3: 3.68 usec per loop
$ ./python -m timeit -s 'import codecs; d = codecs.utf_16_be_decode; x = ("\u263A" * 1000).encode("utf-16be")' 'd(x)'
100000 loops, best of 3: 4.72 usec per loop
utf16_decoder_shift_3.patch:
$ ./python -m timeit -s 'import codecs; d = codecs.utf_16_be_decode; x = (" " * 1000).encode("utf-16be")' 'd(x)'
100000 loops, best of 3: 2.23 usec per loop
$ ./python -m timeit -s 'import codecs; d = codecs.utf_16_be_decode; x = ("\u263A" * 1000).encode("utf-16be")' 'd(x)'
100000 loops, best of 3: 3.11 usec per loop |
|