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Old 2011-04-01, 02:04   #2
Syd's Avatar
Sep 2008
Krefeld, Germany

3468 Posts

Thats exactly what I figured out some time ago. Especially on step 2 GMP 4.x is a lot faster - and I have no idea why.
The fastest combination for my Phenom 2 1090T is GMP 4.3.2 combined with GMP-ECM 6.3, all compiled with --march=barcelona and, of cause, linked statically.

For large numbers > ~ 400 digits linking against gwnum gave a huge speedup.

Table attached: All times in ms, mesaured on Phenom 2, 3.6Ghz, Linux kernel 2.6.35, 64 bit
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Last fiddled with by Syd on 2011-04-01 at 02:10
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