Bulat Ziganshin wrote:
Hello Simon,
It's hard to tell what optimisation level your libraries were compiled with. The default setting is -O, but when building binary distributions we usually set it explicitly to -O2. If you got your binary from another source, they might have only used -O.
not surprising that noone answered this question in cafe :)
actually, main Windows builds goes from Sigbjorn Finne afair. may be from Neil too. so we probably need to warn them that their builds may be sub-optimal?
Thanks chaps, For the record I'm using the Windows version of GHC 6.8.2 downloaded from here http://haskell.org/ghc/download_ghc_682.html MD5 is 5356a12f056a32ef35fa44db2e2204fc I just downloaded the one that's there currently and it's the same as the one I'm using which I think I downloaded in January. Richard.