Mercurial > hg
view README.rst @ 51425:7c6d0b9dde37
rust-index: improve phase computation speed
While less memory efficient, using an array is *much* faster than using a
HashMap, especially with the default hasher. It even makes the code simpler,
so I'm not really sure what I was thinking in the first place, maybe it's more
obvious now.
This fix a significant performance regression when using the rust version of the
code. (however, the C code still outperform rust on this operation)
hg perf::phases on mozilla-try-2023-03-22
- 6.6.3: 0.451239 seconds
- before: 0.982495 seconds
- after: 0.265347 seconds
- C code: 0.183241 second
author | Raphaël Gomès <rgomes@octobus.net> |
---|---|
date | Thu, 22 Feb 2024 15:06:16 +0100 |
parents | c5912e35d06d |
children |
line wrap: on
line source
Mercurial ========= Mercurial is a fast, easy to use, distributed revision control tool for software developers. Basic install:: $ make # see install targets $ make install # do a system-wide install $ hg debuginstall # sanity-check setup $ hg # see help Running without installing:: $ make local # build for inplace usage $ ./hg --version # should show the latest version See https://mercurial-scm.org/ for detailed installation instructions, platform-specific notes, and Mercurial user information. Notes for packagers =================== Mercurial ships a copy of the python-zstandard sources. This is used to provide support for zstd compression and decompression functionality. The module is not intended to be replaced by the plain python-zstandard nor is it intended to use a system zstd library. Patches can result in hard to diagnose errors and are explicitly discouraged as unsupported configuration.