Should be some math functions like powf() optimized by hands?

[aismann]

During the review of DrawNode V2 comes this questions:
Should be some math functions like powf() optimized by hands?

[halx99]

I think powf is ok

[halx99]

recommended to use std::pow

[halx99]

works on linux:

#include <cmath>

constexpr int result = std::pow(10.0f, 3);
int main(int argc, char** argv)
{
    char buf[result];
    constexpr auto xxx = sizeof(buf);
    return 0;
}