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revlog: add the glue to use the Rust `InnerRevlog` from Python The performance of this has been looked at for quite some time, and some workflows are actually quite a bit faster than with the Python + C code. However, we are still (up to 20%) slower in some crucial places like cloning certain repos, log, cat, which makes this an incomplete rewrite. This is mostly due to the high amount of overhead in Python <-> Rust FFI, especially around the VFS code. A future patch series will rewrite the VFS code in pure Rust, which should hopefully get us up to par with current perfomance, if not better in all important cases. This is a "save state" of sorts, as this is a ton of code, and I don't want to pile up even more things in a single review. Continuing to try to match the current performance will take an extremely long time, if it's not impossible, without the aforementioned VFS work.
author Rapha?l Gom?s <rgomes@octobus.net>
date Wed, 19 Jun 2024 19:10:49 +0200
parents 992fcf6b2473
children 5cc8deb96b48
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52162:13815c9decd4 52163:7346f93be7a4
79 # Other vfs code always use `/` and this works fine because python file API 79 # Other vfs code always use `/` and this works fine because python file API
80 # abstract the use of `/` and make it work transparently. For consistency 80 # abstract the use of `/` and make it work transparently. For consistency
81 # vfs will always use `/` when joining. This avoids some confusion in 81 # vfs will always use `/` when joining. This avoids some confusion in
82 # encoded vfs (see issue6546) 82 # encoded vfs (see issue6546)
83 _dir_sep: bytes = b'/' 83 _dir_sep: bytes = b'/'
84
85 # Used to disable the Rust `InnerRevlog` in case the VFS is not supported
86 # by the Rust code
87 rust_compatible = True
84 88
85 # TODO: type return, which is util.posixfile wrapped by a proxy 89 # TODO: type return, which is util.posixfile wrapped by a proxy
86 @abc.abstractmethod 90 @abc.abstractmethod
87 def __call__(self, path: bytes, mode: bytes = b'rb', **kwargs) -> Any: 91 def __call__(self, path: bytes, mode: bytes = b'rb', **kwargs) -> Any:
88 ... 92 ...