I’ve been testing lesson1-pets.ipynb on Windows 10 and comparing against Ubuntu 18.04. While Windows 10 seems to be giving the same results as Ubuntu. Unfortunately Windows is 5x slower than Ubuntu (60m vs 14m) with identical hardware (GPU) and software. CPU-only is impossibly slow on both systems. Windows monitors show that the hardware is way underutilized (20%) whereas Ubuntu is often 100%.
Is anyone else experiencing 5x slowness? Is it due to pickle or other lib not running multi-threaded?