Re: GMP performance on Opteron

[Guillaume Hanrot <Guillaume.Hanrot@loria.fr>]

> As far as I understand, GMP 4.x is not optimised on Opteron as much 
> as on ix86 or sparc, while PARI include assembly code for Opteron, so it
> might be that PARI is faster for small operands. 
> 
> You might want to try the patch I sent for lower GMP overhead to see
> if it make a difference, see
> <http://pari/archives/pari-dev-0508/msg00019.html>.

... or (and) you can recompile GMP with the assembly routines 
for Opteron written by Pierrick Gaudry, see 

http://www.loria.fr/~gaudry/mpn_AMD64/

which should give a significant speedup. 

Guillaume
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