I haven't benchmarked, but I think you'll find DyNet to be significantly faster than DRAGNN in that setting. I'm also not sure DRAGNN is a good direction to he

I haven't benchmarked, but I think you'll find DyNet to be significantly faster than DRAGNN in that setting. I'm also not sure DRAGNN is a good direction to head in, if that's the problem. You'll never ever be able to change anything in it, so if performance isn't good you're stuck. Writing the forward pass isn't very difficult, so I'd much rather be able to replace parts of a network with optimised code if necessary.