Mon May 10 06:33:33 PDT 2010 [email protected]
* Re-engineer the derived Ord instance generation code (fix Trac #4019)
As well as fixing #4019, I rejigged the way that Ord instances are
generated, which should make them faster in general. See the
Note [Generating Ord instances].
I tried to measure the performance difference from this change, but
the #4019 fix only removes one conditional branch per iteration, and
I couldn't measure a consistent improvement. But still, tihs is
better than before.
M ./compiler/typecheck/TcGenDeriv.lhs -273 +281
View patch online:
http://darcs.haskell.org/cgi-bin/darcsweb.cgi?r=ghc;a=darcs_commitdiff;h=20100510133333-1287e-b3c0eb04b4039eb0f7b2da3b6891c8530eff14dc.gz
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