Mercurial > hg
view README.rst @ 50942:75d3306fbc9a stable
tags: avoid expensive access to repo.changelog in a loop
repo.changelog needs some cache invalidation when run on filtered repository.
Accessing it in that loop can be expensive when there is many heads (e.g.
mozilla try and it 25 000 heads).
Note that the loop itself seems useless, but after this patch it no longer take
about ⅛ of the time we spend computing cache for mozilla try.
before :
! wall 0.350994 comb 0.350000 user 0.330000 sys 0.020000 (median of 28)
after :
! wall 0.319520 comb 0.310000 user 0.290000 sys 0.020000 (median of 30)
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
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date | Wed, 21 Jun 2023 21:57:44 +0200 |
parents | c5912e35d06d |
children |
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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.