[Haskell-cafe] Performance Issue

[Bryan O'Sullivan]

On Tue, May 18, 2010 at 9:30 AM, Richard Warburton <
richard.warburton at gmail.com> wrote:

> A colleague of mine pointed out that ghc wasn't performing as he
> expected when optimising some code.  I wonder if anyone could offer
> any insight as to why its not noting this common subexpression:


GHC performs almost no common subexpression elimination, the reasons being
that it can introduce space leaks and undesired extra laziness.
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