CUP ONLY
8x8 - 58 secs
16x16 - 59 secs
32x32 - 1 min
64x64 - 1 min 2 secs
128x128 - 1 min 9 secs
256x256 - 1 min 53 secs
512x512 - 5 mins 54 secs
GPU ONLY
8x8 - 27 secs
16x16 - 22 secs
32x32 - 21 secs
64x64 - 21 secs
128x128 - 22 secs
256x256 - 22 secs
512x512 - 23 secs
CPU & GPU
8x8 - 20 secs
16x16 - 18 secs
32x32 - 18 secs
64x64 - 23 secs
128x128 - 50 secs
256x256 - 2 mins 6 secs
512x512 - 4 mins 58