[Haskell-cafe] Regression moving to ghc7

[Ivan Lazar Miljenovic]

On 7 June 2011 10:12, tsuraan <tsuraan at gmail.com> wrote:
>> From the #haskell channel, it looks like the horrible speed issue on
>> this code is specific to my system.  I'm re-building ghc7 now
>> (bootstrapping ghc7 with ghc7 instead of ghc6), so maybe that will
>> make something happier.
>
> FWIW, rebuilding ghc7 using ghc7 as the bootstrapping implementation
> (and disabling the ghcquickbuild option, whatever that does) did give
> me a sane ghc7 that is giving the expected speeds.  So, if anybody
> feels like pointing fingers at anything I could be doing better in my
> program, that's definitely welcome, but the regression part of my
> problem is gone.

Oh, you built with ghcquickbuild?  I don't remember the details, but
if memory serves it disables a lot of optimisations, etc. just to get
GHC built quicker to test that it compiles.  So you probably don't
want that ;-)

-- 
Ivan Lazar Miljenovic
Ivan.Miljenovic at gmail.com
IvanMiljenovic.wordpress.com