On 08/01/2012 11:40 AM, Michael Wilber wrote:
...
Fascinating. I wonder if your machine has better floating point hardware
So maybe this is just something to watch out for on older chips.
9000ms vs 350ms is a surprising difference! That's got to be software
floating-point.
I know my floating-point hardware is pretty good. For the math
collection, I've written a test suite that checks Racket's flonum ops
against MPFR, an arbitrary-precision floating-point library whose
algorithms are proved correct in various research papers. My FPU gets
everything I've tested right, while it's pretty common for the outputs
for tricky inputs (like tan(HUGE_NUMBER)) to be a few bits off.
FWIW, /proc/cpuinfo says this is my processor:
Intel(R) Core(TM) i7-2630QM CPU @ 2.00GHz
which is similar to Asumu's.
Neil ⊥
____________________
Racket Users list:
http://lists.racket-lang.org/users
