Un-inline Functions.h into Functions.cpp (#39446)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/39446
In my unscientific testing, this reduces startup time by 50% on gcc 8.3.
That's a big fucking deal.
Signed-off-by: Edward Z. Yang <ezyang@fb.com>
Test Plan: Imported from OSS
Differential Revision: D21862037
Pulled By: ezyang
fbshipit-source-id: 69fb401956304a97f8f80c48cecdb1cb199ff434
