new figures, after updating bytestring (0.9.0.1.1 -> 0.9.1.2) && using -O2 time Main < nums real 0m2.531s user 0m0.015s sys 0m0.015s time Main2 < nums real 0m13.999s user 0m0.015s sys 0m0.015s time Main3 < nums real 0m2.796s user 0m0.015s sys 0m0.015s thats more like it, even the unpacking didn't hurt so much. the morals: "Thou shalt update your libraries" & "Thou shalt not forget to turn on optimizations" before bitching it's too slow ;-))) thx On Tue, Oct 7, 2008 at 5:19 AM, Don Stewart <dons@galois.com> wrote:
Hmm. How are you compiling it? Using bytestring 0.9.1.x ?
Should be fast,
http://shootout.alioth.debian.org/gp4/benchmark.php?test=sumcol&lang=all
Assuming you're turning on optimisations ( ghc -O2 )
-- Don