Mercurial > hg
view mercurial/help/hgignore.txt @ 22451:186fd06283b4
revset: lower weight for _intlist function
The histedit command uses a revset like:
(_intlist('1234\x001235')) and merge()
Previously the optimizer gave a weight of 1.5 to the _intlist side (1 for the
function, 0.5 for the string) which caused it to process the merge() side first.
This caused it to evaluate merge against every commit in the repo, which took
2.5 seconds on a large repo.
I changed the weight of _intlist to 0, since it's a trivial calculation, which
makes it process intlist first, which makes merge apply only to the revs in the
list. Which makes the revset take 0.15 seconds now. Cutting off 2.4 seconds off
our histedit performance.
>From the revset benchmark:
revset #25: (_intlist('20000\x0020001')) and merge()
0) obsolete feature not enabled but 54243 markers found!
! wall 0.036767 comb 0.040000 user 0.040000 sys 0.000000 (best of 100)
1) obsolete feature not enabled but 54243 markers found!
! wall 0.000198 comb 0.000000 user 0.000000 sys 0.000000 (best of 9084)
author | Durham Goode <durham@fb.com> |
---|---|
date | Fri, 12 Sep 2014 14:21:18 -0700 |
parents | f1a3ae7c15df |
children | 7072b91ccd20 |
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Synopsis ======== The Mercurial system uses a file called ``.hgignore`` in the root directory of a repository to control its behavior when it searches for files that it is not currently tracking. Description =========== The working directory of a Mercurial repository will often contain files that should not be tracked by Mercurial. These include backup files created by editors and build products created by compilers. These files can be ignored by listing them in a ``.hgignore`` file in the root of the working directory. The ``.hgignore`` file must be created manually. It is typically put under version control, so that the settings will propagate to other repositories with push and pull. An untracked file is ignored if its path relative to the repository root directory, or any prefix path of that path, is matched against any pattern in ``.hgignore``. For example, say we have an untracked file, ``file.c``, at ``a/b/file.c`` inside our repository. Mercurial will ignore ``file.c`` if any pattern in ``.hgignore`` matches ``a/b/file.c``, ``a/b`` or ``a``. In addition, a Mercurial configuration file can reference a set of per-user or global ignore files. See the ``ignore`` configuration key on the ``[ui]`` section of :hg:`help config` for details of how to configure these files. To control Mercurial's handling of files that it manages, many commands support the ``-I`` and ``-X`` options; see :hg:`help <command>` and :hg:`help patterns` for details. Files that are already tracked are not affected by .hgignore, even if they appear in .hgignore. An untracked file X can be explicitly added with :hg:`add X`, even if X would be excluded by a pattern in .hgignore. Syntax ====== An ignore file is a plain text file consisting of a list of patterns, with one pattern per line. Empty lines are skipped. The ``#`` character is treated as a comment character, and the ``\`` character is treated as an escape character. Mercurial supports several pattern syntaxes. The default syntax used is Python/Perl-style regular expressions. To change the syntax used, use a line of the following form:: syntax: NAME where ``NAME`` is one of the following: ``regexp`` Regular expression, Python/Perl syntax. ``glob`` Shell-style glob. The chosen syntax stays in effect when parsing all patterns that follow, until another syntax is selected. Neither glob nor regexp patterns are rooted. A glob-syntax pattern of the form ``*.c`` will match a file ending in ``.c`` in any directory, and a regexp pattern of the form ``\.c$`` will do the same. To root a regexp pattern, start it with ``^``. .. note:: Patterns specified in other than ``.hgignore`` are always rooted. Please see :hg:`help patterns` for details. Example ======= Here is an example ignore file. :: # use glob syntax. syntax: glob *.elc *.pyc *~ # switch to regexp syntax. syntax: regexp ^\.pc/