About performence

Hi,
Base on your matlab code, i have finally finished the c++ implement (with some modifications). But with the configuration define on your code, i.e. 68 landmarks, 6 tree depth, 10 trees per forest, 5 stages, i could hardly achieve 1000 FPS, actually 350~450 FPS only.
I notice that when generating the binary features, the binary tree traverse is quite time consuming, even longer than the global prediction (which is almost vector summation, can be optimized by avx instructions).
Btw, my laptop use cpu I7-3820QM 2.7GHz, all test is running on a single core. It would be grateful if you can share some advice.