[PyTorch] typeid: ensmallen scalarTypeItemSizes (#50165)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/50165
There are currently 17 types, so this used to stretch across 3 cache lines and now it fits in one. All the types in question seem to be way under 255 bytes in size anyway.
ghstack-source-id: 119485090
Test Plan: CI, profiled internal benchmarks
Reviewed By: smessmer
Differential Revision: D25813574
fbshipit-source-id: c342d4f12a7b035503e1483b8301f68d98f3c503
