My time:
CPU: Intel i7 2.3 Ghz
GPU: Nvidia GT 750 M
OS: Windows 10 64bit
Time: 10:05.86 (GPU - CUDA) tile size - 1500x1500
Time: 05:02.85 (CPU) tile size - 15x15
My time:
CPU: Intel i7 2.3 Ghz
GPU: Nvidia GT 750 M
OS: Windows 10 64bit
Time: 10:05.86 (GPU - CUDA) tile size - 1500x1500
Time: 05:02.85 (CPU) tile size - 15x15