Date: Apr 1, 2013 6:46 AM Author: Bruno Luong Subject: Re: Which fft package does matlab use? > GFlopsMM(s) = NIter*2*size(A,1)^3/1e9/t;

> GFlopsFFT(s) = NIter*5*N*log2(N)*N/1e9/t2;

So you assume that:

(1) the computer does not use any multi-threading during MM or FFT?

(2) MATLAB matrix multiplication is O(n^3) (which is not the optimal)?

(3) memory access data are negligible (usually not right)?

Bruno