Reply to Training LSTM: 100x Slower on M1 GPU vs. CPU Math Correction: 7s per epoch vs. 2hrs per epoch (i.e. 60min/hr * 60s/min * 2hrs = 7200 seconds), which means that M1 GPU is on the order of 1000x slower than M1 CPU in this case (i.e. 7200s / 7s ~ 1,029) Machine Learning & AI General Nov ’21