[Not really about enhanced primitive support - more about optimization
on the jvm.]
On Tue, 22 Jun 2010 01:47:26 -0400
David Nolen <dnolen.li...@gmail.com> wrote:
> Yet consider this, If I'm writing OpenGL code in Penumbra I will have quite
> a bit of code that amounts to the following:
>
> ; 630 msecs
> (dotimes [_ 10]
> (time
> (dotimes [_ 1000000000]
> (+ 1 2))))
>
> Yes. With Rich's primitive work we can get to *1 billion arithmetic
> operations* in < 2/3 of a second on commodity hardware.
Which begs the question - why are you mucking about with SISD
algorithms if you need that kind of thing to be fast? IIUC, recent
versions of the JVM can access the SIMD instructions that have been
available on most commodity hardware for the last couple of years. Why
aren't you trying to get to those to get a serious performance boost?
Better yet, given that you're using OpenGL and presumably have real
graphics hardware available, why aren't you trying to push this stuff
out to the vector processor on the GPU where it will really fly?
<mike
--
Mike Meyer <m...@mired.org> http://www.mired.org/consulting.html
Independent Network/Unix/Perforce consultant, email for more information.
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