Add scoring script for Mixture of Experts
Add scoring script for Mixture of Experts

Summary: Pull Request resolved: https://github.com/pytorch/fairseq/pull/523

Differential Revision: D14200060

Pulled By: myleott

fbshipit-source-id: a2e3d6ec7c6b9cacc9f44565d2b91e65b580b084

pytorch/fairseq,pytorch/fairseq,pytorch/fairseq