[Haskell-cafe] -O2 compile option can give speed increase over -O. Fasta shootout program test runs.

[Simon Peyton-Jones]

| It seems the -O2 option can give a significant speed increase relative
| to just the -O option. This is contrary to the documentation which says

-O2 switches on SpecConstr, which has improved quite a bit in the last year or so. There's a paper on my home page about it ("Constructor specialization for Haskell").

Perhaps we should review the documentation you point to!

Simon