[theano-users] Re: Speed difference between backends

I noticed this problem late 2016 while investigating scan overhead. Check here . The comment also have a link to a script help reproducing the problem. On Friday, February 17, 2017 at 7:43:39 PM UTC+8, Ozan Çağlayan

[theano-users] Speed difference between backends

Hi, With the current Theano HEAD + libgpuarray, I launched two RNN-based MT systems with the old backend and the new backend and apparently the new backend is a little bit slower than the old one. This is on CUDA 7.5, CUDNN5.1 and Tesla K40 GPU, batchsize=64: old backend: 166ms / batch new