On Thu, Jun 21, 2007 at 01:39:24PM +0100, Jon Harrop wrote:
Awesome stuff!
On Thursday 21 June 2007 12:36:27 Philip Armstrong wrote:
On Thu, Jun 21, 2007 at 12:25:44PM +0100, Sebastian Sylvan wrote:
>Try using floats for the vector, and strict fields (add a ! to the
>fields in the data declaration).
Because the optimisation page on the haskell wiki is very explicit
about never using Float when you can use Double, that's why. An older
revision used Float and it was slower than the current one. Making the
datatypes strict also makes no difference.
Where exactly do the !s go and what do they do?
On the datatypes:
data Vector = V !Double !Double !Double
for instance. They tell the compiler to make those fields strict
rather than lazy. This may or may not help things...
OCaML floats are Doubles, at least on x86.
Yes. OCaml doesn't have a 32-bit float storage format, apart from an
entirely-float big array. Also, the ML in OCaml doesn't stand for
metalanguage. ;-)
Point!
I take it you saw the whole language comparison:
http://www.ffconsultancy.com/languages/ray_tracer/
Yup. I'd been meaning to run off a haskell version for a
while.
I'll be uploading concurrent implementations ASAP. Haskell should do well
there... :-)
I'll be on the lookout.
PS: You spelled my name wrong!
Sorry!
Phil
--
http://www.kantaka.co.uk/ .oOo. public key: http://www.kantaka.co.uk/gpg.txt
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