CPU/GPU Time Ratios. Illustration of the CPU/GPU time ratio as a function of n, for the t, Pearson and Cox rank score  tests for K = 60000. For the t and Pearson tests B = 10000 permutations are used while for the Cox rank score test B = 10 permutations are used. The GPU times (in seconds) are also shown. The results are based on one simulation replicate.