[Haskell-cafe] Fannkuch timings
daniel.is.fischer at web.de
Tue Jan 10 06:00:25 EST 2006
On my 1.2 GHz Duron (SuSE linux), I get significantly different timings than
those on the wiki. Sebastian Sylvan's, Kimberley Burchett's and Bertram
Felgenhauer's all take roughly thrice as long as posted (that's rather
consistent, but the factor is surprisingly large). Cale Gibbard's takes 18.44
secs for N = 9, which is rather bad, I think.
Really surprising (to me) are the following (N = 10)
Algo Wiki Here
Clean imperative 2.1 s 4.54 s
Fastest Pure 1.8 s 8.65 s
Fastest Impure 1.4 s 1.77 s.
So the ratio for the fast impure version is approximately 1.6GHz/1.2GHz, which
is natural, but the ratio for clean impure is 2.2 and for the fast pure
version, it's even 4.8!
All are compiled with -O2 -optc-O3.
Does that mean my system is really poor in producing binaries from pure
And why would that be so?
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