Floatpower vs float*float - Printable Version

Floatpower vs float*float - Printable Version

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+--- Thread: Floatpower vs float*float (/showthread.php?tid=414327)

Floatpower vs float*float - lavamike - 09.02.2013

Is there a difference between using Floatpower vs multiplying the floats by eachother?

Example:

pawn Код:

new Float:X;
X = 5.3423;
X = floatround(floatpower(X, 2)); // This or
X = floatround((X * X)); // this

Are they exactly the same, is floatpower slower because it has to call a function or something? Any info would be appreciated, thanks.

Respuesta: Floatpower vs float*float - TheChaoz - 09.02.2013

Ok so after running a simple speed test it looks like that floatpower in fact is much more slower than the multiply method:

pawn Код:

#include <a_samp>

public OnFilterScriptInit()
{
    new Float:X = 3.5, Float:res;
    new time = GetTickCount();
    for(new i; i<10000000; i++)
        res = X*X;
    printf("Multiply time: %ims", GetTickCount()-time);
    time = GetTickCount();
    for(new i; i<10000000; i++)
        res = floatpower(X, 2);
    printf("floatpower time: %ims", GetTickCount()-time);
    return 1;
}

Results:

Код:

Multiply time: 680ms
floatpower time: 2109

Re: Floatpower vs float*float - Vince - 09.02.2013

I wonder why that is, because this is found in float.inc:

pawn Код:

stock Float:operator*(Float:oper1, oper2)
    return floatmul(oper1, float(oper2));       /* "*" is commutative */

Re: Floatpower vs float*float - lavamike - 10.02.2013

That's quite interesting actually, thanks for the info. I also kinda wonder why that is as well, seems strange.