2009/6/25 Christian Schladetsch <christian.schladetsch@gmail.com>:
Hello,
In fact, fixed point is not faster on many architectures than floating point. One assumes that it is mainly PSP, DS and Gamecube guys that want fixed-point just for speed these days (I'm looking at you, Kenny ;).
On my quad core desktop there is a difference between ints and floats. I just wrote a quick test with the following loop for some random initialization values: for (int i = 0; i < iterations; ++i) { sum += a * b; a += b; } I used MSVC++ to compile. I set iterations to a billion. When I used ints I got around 800 ticks. When I used floats I got around 3700 ticks. That is almost a factor five. For my purposes, that's an optimization I am willing to sacrifice a lot for. Soren