Re: Linus' sha1 is much faster!

[Giuseppe Scrivano <gscrivano@gnu.org>]

Hi,

These are the results I reported (median of 5 plus an additional not
considered first run) on the Steve Reid's SHA1 implementation using the
same flags to the compiler that I used for previous tests.

GCC 4.3.3:  real	0m2.627s
GCC 4.4.1:  real	0m3.742s

In both cases it showed to be slower than other implementations I have
already tried.

Additional note: as for gnulib SHA1, GCC 4.4.1 produced slower code than
GCC 4.3.3.

Cheers,
Giuseppe



Steven Noonan <steven@uplinklabs.net> writes:

>
> Interesting. I compared Linus' implementation to the public domain one
> by Steve Reid[1], which is used in OpenLDAP and a few other projects.
> Anyone with some experience testing these kinds of things in a
> statistically sound manner want to try it out? In my tests, I got
> this:
>
> (average of 5 runs)
> Linus' sha1: 283MB/s
> Steve Reid's sha1: 305MB/s
>
> - Steven
>
> [1] http://gpl.nas-central.org/SYNOLOGY/x07-series/514_UNTARED/source/openldap-2.3.11/libraries/liblutil/sha1.c