[vector] #32: Performance of concatMap and O2/Odph
vector
vector at projects.haskell.org
Thu Nov 18 18:24:21 EST 2010
#32: Performance of concatMap and O2/Odph
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Reporter: choener | Owner:
Type: defect | Status: new
Priority: critical | Milestone: 0.7.1
Version: 0.6 | Resolution:
Keywords: |
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Comment (by rl):
Sigh. I fixed the [http://hackage.haskell.org/trac/ghc/ticket/4448 GHC
problem] which also affected a couple of DPH programs but that didn't do a
lot for this particular example. This is rather annoying.
Nevertheless, I wonder if this GHC patch has any effect at all on your
programs:
{{{
Thu Nov 18 13:28:39 PST 2010 Roman Leshchinskiy <rl at cse.unsw.edu.au>
* ForceSpecConstr now forces specialisation even for arguments which
aren't scrutinised
M ./compiler/specialise/SpecConstr.lhs -24 +31
}}}
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Ticket URL: <http://trac.haskell.org/vector/ticket/32#comment:12>
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