Really bad code for single method dictionaries?
dons at galois.com
Fri Mar 27 03:32:42 EDT 2009
I don't think this is still the case.
Roman, do you remember?
> I was reading the stream fusion code today and came across a comment stating
> that single element dictionaries interacted poorly with GHC's optimizer:
> class Unlifted a where
> expose [...]
> -- | This makes GHC's optimiser happier; it sometimes produces really bad
> -- code for single-method dictionaries
> unlifted_dummy [...]
> A cursory search on GHC's Trac shows no corresponding bug; is this no longer
> a problem? A small problem? I would like to know more about it.
> Jason Dusek
> |...stream fusion code...|
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