Re: Common subexpression elemination (CSE)

On 11/27/06, Lennart Augustsson wrote:

GHC doesn't normally do CSE. CSE can cause space leaks, so you can't do it willy-nilly. I'm sure there are some strict contexts where it could be done safely, but I don't think ghc uses that information (yet).

-- Lennart

My apologies in advance for asking possibly stupid questions, but I don't understand this. How exactly can CSE cause space leaks, and what does this have to do with strictness? Cheers, Dinko