Replacement for GMP: Update
p.tanski at gmail.com
Fri Aug 11 16:26:13 EDT 2006
Simon PJ and Bulat,
> [the] ForeignPtr
> solution [has] gotten a lot cheaper in GHC 6.6 than it used to be, so
> it's worth trying. A merit of the approach is that is avoids fiddling
> with the bignum allocator at all.
I actually did not know that until today; I have tried to keep up
with the rapid changes going on but until Simon Marlow posted the FFI
syntax patch on cvs-ghc-request I had not read into it that much. It
won't be too much trouble for me to do a bare FFI binding to GMP or
another library (people seem to be having problems with OpenSSL's
license) but what I have been doing still applies: writing bitwise
operators and cleaning things up. I don't know how much the
indirection of a FFI binding would degrade the speed compared to a
direct C-- binding (you have an extra function call with FFI); it
should not be any more costly than indirection through two pointers.
This will be quick: I will set up a GMP-FFI binding as a speed-
reference, for starters.
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