How much slower?

Pytorch 0.3.1 was 1.4 times faster than 0.4.1 in the simple code. In addition, learning time increased from 5 hours and 20 minutes to 6 hours and 30 minutes in order code.

what GPU are you using?

I used Titan XP

How did you install pytorch? (conda / pip / what command?)

I am using a conda and I used the following command to install the 0.3.1
conda install -c peterjc123 pytorch cuda90
and when installing the 0.4.1, I used the following command
conda install pytorch -c pytorch
(in windows 10)

Thanks