Disappointing math performance compared to GDC
Gabor Mezo via digitalmars-d-ldc
digitalmars-d-ldc at puremagic.com
Wed Oct 8 09:26:01 PDT 2014
On a second thought I can see that the main problem is my
computation functions are not inlined. They are likes of this:
float sigmoid(float value, float alpha) nothrow
{
return (value * alpha) / (1.0f + nfAbs(value * alpha));
// Elliot
}
float sigmoidDeriv(float value, float alpha) nothrow
{
return alpha * 1.0f / ((1.0f + nfAbs(value * alpha)) * (1.0f +
nfAbs(value * alpha))); // Elliot
}
float linear(float value, float alpha) nothrow
{
return nfMin(nfMax(value * alpha, -alpha), alpha);
}
Why those calls are not inlined?? Or vectorized?
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