On 08/16/2012 03:15 PM, Matthias Pleh wrote:
I've created a simple 4x4 Matrix struct and have made some tests, with surprising results. (although I've heard from similar results in c++)struct mat4 { float[4][4] m; mat4 opMul(in mat4 _m); } mat4 mul(in mat4 m1, in mat4 m2); I've tested this 2 multiplication functions (overloaded and free). Result (100_000 times, windows7 64bit, 32bit build): DMD: (dmd -O -inline -release) opMul: 20 msecs mul : 1355 msecs GDC: (gdc -m32 -O3 -frelease) opMul: 10 msecs mul : 1481 msecs Why this huge difference in performance?
Note that you have missed to provide the full benchmark code listing.
