Il giorno 07/nov/2012, alle ore 08:40, Serhiy Storchaka <report@bugs.python.org> ha scritto:

> Serhiy Storchaka added the comment:
> 
> I tested different kind of strings.
> 
> $ ./python -m timeit -n 1 -s "t = b'a' * 10**8"  "hash(t)"
> $ ./python -m timeit -n 1 -s "t = 'a' * 10**8"  "hash(t)"
> $ ./python -m timeit -n 1 -s "t = '\u0100' * 10**8"  "hash(t)"
> $ ./python -m timeit -n 1 -s "t = '\U00010000' * 10**8"  "hash(t)"
> 
>       current   SipHash
> 
> bytes  181 msec  453 msec  2.5x
> UCS1   429 msec  453 msec  1.06x
> UCS2   179 msec  897 msec  5x
> UCS4   183 msec  1.79 sec  9.8x

Hi Serhiy,

can you please attach the generated assembly code for the siphash function with your compiler and your optimization flags (that is, the one that produces the above results)?

Thanks!
-- 
Giovanni Bajo