Re: RealFrac methods for Double and Float

On Tuesday 12 October 2010 17:15:14, Antoine Latter wrote:

On Tue, Oct 12, 2010 at 10:02 AM, Tyson Whitehead wrote:

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On October 11, 2010 15:12:12 Daniel Fischer wrote:

...

GHC's new code generator does some incredible stuff with the code for Float's RealFrac instance, properFraction has become about _seven times_ faster, floor and ceiling about _thirteen times_ and round about _10.5 times_ (values for my box, the exact numbers will differ, but the tendency will be the same).

Out of curiosity, by new code generator, are you meaning just the stock GHC 7 code path or are you meaning the new now available but disabled by default unless you use some flag (which I forget right now) code generation path.

Cheers!  -Tyson

When I did the GHC 7 timings I simply ran the shell script provided in the linked tarball - no funny business.

Antoine

Yep, just a vanilla perf build of HEAD.