Mercurial > hg
view README @ 30596:be520fe3a3e9
changelog: keep track of file end in appender (issue5444)
Previously, changelog.appender.end() would compute the end of the file by
joining all the current appended data and checking the length. This is an O(n)
operation. e240e914d226 introduced a seek call before every revlog write, which
means we are hitting this O(n) behavior n times, which causes changelog writes
during a pull to be n^2.
In our large repo, this caused pulling 100k commits to go from 17s to 130s. With
this fix, it's back to 17s.
author | Durham Goode <durham@fb.com> |
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date | Thu, 15 Dec 2016 11:00:18 -0800 |
parents | 4b0fc75f9403 |
children | 76b171209151 |
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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.