Yesterday I upgraded my pytorch to v0.1.11. I ran the same training script. I noticed that the time for each batch has increased from 0.8 seconds to 2.9 seconds. Nothing is changed except the pytorch. My old version is 0.1.9+67f9455. Now I am trying to upgrade to cudnn v6 to see whether it could solve my isse. I wonder whether anyone had the same problem with me.