pytorch

c47464ed - [PyTorch] Further reduce cost of TypeMeta::_typeMetaData (by 10x!) (#98105)

[PyTorch] Further reduce cost of TypeMeta::_typeMetaData (by 10x!) (#98105) Currently we should be paying a small cost for the thread-safe initialization of `index`. Now we should eliminate that cost. (10x figure in the title comes from internal benchmark that just calls `TypeMeta::Match<caffe2::Tensor>()` in a loop). Differential Revision: [D44597852](https://our.internmc.facebook.com/intern/diff/D44597852/) Pull Request resolved: https://github.com/pytorch/pytorch/pull/98105 Approved by: https://github.com/ezyang