Luke the Hiesterman wrote:
That said, the original question is a good one. Using x*x instead of
pow(x,2)
would be quite a bit faster, so except for clarity reasons, there
isn't a good
reason to use pow() in that case.
Would it really be that much faster? I don't know exactly how pow() is
implemented, but I assume it's basically just a loop of multiplications,
in which case it would basically be the same as x*x in this case, since
it would exit after the first iteration....
Why would you assume that? Both parameters to pow are floating point,
so in general I'd assume that logarithms and exponentials are involved.
Maybe it has a special case for the exponent being an integer, but I
wouldn't assume that.
--
James W. Walker, Innoventive Software LLC
<http://www.frameforge3d.com/>
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