Add zipfile serialization (#29232)
Summary:
Stacked PRs
* https://github.com/pytorch/pytorch/issues/29244 - Use custom CRC
* **https://github.com/pytorch/pytorch/issues/29232 - Add zipfile serialization**
This adds a serialization method that uses a zipfile (https://github.com/pytorch/pytorch/issues/26567). Right now it is
guarded behind a flag `_use_new_zipfile_serialization`. In release mode it seems to have performance about the same / slightly better than the current serialization in some simple benchmarks for large/small tensors.
Follow ups:
* Flip the `_use_new_zipfile_serialization` flag
Pull Request resolved: https://github.com/pytorch/pytorch/pull/29232
Differential Revision: D18332036
Pulled By: driazati
fbshipit-source-id: 1bac0847c4d599612cba905f2cac8248783be2f4
