[hashcash] Re: Hashcash performance improvements
- From: Jonathan Morton <chromi@xxxxxxxxxxxxxxxxxxxxx>
- To: hashcash@xxxxxxxxxxxxx
- Date: Thu, 27 May 2004 08:55:44 +0100
> Eliminating the huge overhead that this reveals would result in a 50%
> performance boost, even with no CPU-specific optimisations. (Probably
> less on x86, since the hashing function takes relatively longer there,
> but still significant.)
Excuse me while I eat my own words. :)
I just finished writing the first round of "libfastmint" routines, and
discovered that far from being only *slightly* improved, I've achieved
a *doubling* of performance on x86. I'm seeing a steady 2 million
hashes per second on my 1.6GHz Athlon-XP, which is a long way up from
last week.
When compiling with CodeWarrior, I now get 1 million hashes per second
on my 667MHz G4, but only about 700K from GCC. Further investigation
is warranted - the GCC performance is only a minor improvement over the
original code.
I'll bundle up the new code and transmit it later.
--------------------------------------------------------------
from: Jonathan "Chromatix" Morton
mail: chromi@xxxxxxxxxxxxxxxxxxxxx
website: http://www.chromatix.uklinux.net/
tagline: The key to knowledge is not to rely on people to teach you it.
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