[Haskell-cafe] FPS lib
Donald Bruce Stewart
dons at cse.unsw.edu.au
Sat Oct 22 00:54:50 EDT 2005
> 2005/10/19, Simon Marlow <simonmar at microsoft.com>:
> > On 19 October 2005 01:08, Donald Bruce Stewart wrote:
> > > Ah!! So what's going on on Linux, I wonder. Could it be something
> > > about
> > > 6.4.1? Are we seeing the difference between ForeignPtrs from 6.4 to
> > > 6.5? I will investigate.
> > I bet that's the difference between ForeignPtrs in 6.4.1 and 6.5. I'm
> > very tempted to merge the ForeignPtr optimisations into 6.4.2, so we can
> > benefit from this earlier. The changes are all confined to one module
> > (GHC/ForeignPtr.hs).
> I made my benchmarking with ghc-6.5 and I am getting relatively the
> same result as with ghc-6.4.1. I checked that the optimized ForeignPtr
> implementation is in my source tree. Any thoughts?
Ok, rerunning the test you posted with only the compiler version
varying (so, just the FPS ForeignPtr code on OpenBSD x86, Pentium M 1.6G).
With ghc 6.4.1
And with ghc 6.5
Wow, ForeignPtr was slow with 6.4.1!
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