#3627: Profiling loses eta-expansion opportunities unnecessarily
---------------------------------------+------------------------------------
Reporter: simonpj | Owner:
Type: run-time performance bug | Status: new
Priority: low | Milestone: _|_
Component: Compiler | Version: 6.10.4
Severity: normal | Keywords:
Difficulty: Unknown | Testcase:
Os: Unknown/Multiple | Architecture: Unknown/Multiple
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If I have
{{{
f = scc "f"
let x = scc "g" y in
\z -> ...
}}}
then we don't see that f has arity 1. Because `SimplUtils.mkLam` only
does eta expansion if there is at least one value lambda.
I'm making a ticket for this so that we don't forget it, but it's not very
high priority.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3627>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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