Separate Moments from math and optimize it (#16175)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/16175
Separate Moments from math and optimize it
i-am-not-moving-c2-to-c10
Reviewed By: houseroad
Differential Revision: D13742472
fbshipit-source-id: 90757d908d38c98ca69818855aaf68315e525992
