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narrow: intersect provided matcher with narrowmatcher in `hg diff`...
narrow: intersect provided matcher with narrowmatcher in `hg diff` This provides significant speedups when running diff, and no change in behavior that I'm aware of (or that the tests found). I tested with a repo that I started using narrow in after it was created and attempted to run `hg diff -c .` and similar commands in it on a commit that had files not in the narrowspec. Timing numbers below, using a similar setup as my previous commits. before=9db85644, m-u is mozilla-unified at eb39298e432d (flatmanifest) and 0553b7f29eaf (treemanifest). l-d-r is a repo simulating a situation I've encountered where there's one directory with 30k+ subdirectories. N means narrow, T means treemanifest. The narrowspec is pretty small when in use, and importantly the narrowspec is applied *after* doing the initial checkout (without narrowing), so all of these files exist in the filesystem, which is not normally the case if someone has been using narrow for the entire life of the clone. Anything less than a 5% difference in performance is most likely noise. diff --git: repo | N | T | before (mean +- stdev) | after (mean +- stdev) | % of before ------+---+---+------------------------+-----------------------+------------ m-u | | | 1.292 s +- 0.009 s | 1.295 s +- 0.010 s | 100.2% m-u | | x | 1.296 s +- 0.042 s | 1.299 s +- 0.026 s | 100.2% m-u | x | | 1.292 s +- 0.010 s | 1.297 s +- 0.021 s | 100.4% m-u | x | x | 84.2 ms +- 1.2 ms | 83.6 ms +- 0.2 ms | 99.3% l-d-r | | | 188.7 ms +- 2.7 ms | 188.8 ms +- 2.0 ms | 100.1% l-d-r | | x | 189.9 ms +- 1.5 ms | 189.4 ms +- 1.2 ms | 99.7% l-d-r | x | | 97.1 ms +- 1.0 ms | 87.1 ms +- 1.0 ms | 89.7% <-- l-d-r | x | x | 96.9 ms +- 0.8 ms | 87.2 ms +- 0.7 ms | 90.0% <-- diff -c . --git: repo | N | T | before (mean +- stdev) | after (mean +- stdev) | % of before ------+---+---+------------------------+-----------------------+------------ m-u | | | 231.6 ms +- 3.1 ms | 228.9 ms +- 1.6 ms | 98.8% m-u | | x | 150.5 ms +- 1.7 ms | 150.7 ms +- 1.4 ms | 100.1% m-u | x | | 233.7 ms +- 2.4 ms | 232.2 ms +- 1.9 ms | 99.4% m-u | x | x | 126.1 ms +- 1.2 ms | 126.8 ms +- 1.2 ms | 100.6% l-d-r | | | 82.1 ms +- 2.0 ms | 81.8 ms +- 1.4 ms | 99.6% l-d-r | | x | 3.732 s +- 0.020 s | 3.746 s +- 0.027 s | 100.4% l-d-r | x | | 83.1 ms +- 0.8 ms | 107.6 ms +- 2.4 ms | 129.5% <-- l-d-r | x | x | 758.2 ms +- 38.8 ms | 188.5 ms +- 1.8 ms | 24.9% <-- rebase -r . --keep -d .^^: repo | N | T | before (mean +- stdev) | after (mean +- stdev) | % of before ------+---+---+------------------------+-----------------------+------------ m-u | | | 5.532 s +- 0.087 s | 5.496 s +- 0.016 s | 99.3% m-u | | x | 5.554 s +- 0.061 s | 5.532 s +- 0.013 s | 99.6% m-u | x | | 5.602 s +- 0.134 s | 5.508 s +- 0.035 s | 98.3% m-u | x | x | 582.2 ms +- 15.2 ms | 572.9 ms +- 12.0 ms | 98.4% l-d-r | | | 629.5 ms +- 12.3 ms | 622.5 ms +- 7.3 ms | 98.9% l-d-r | | x | 6.173 s +- 0.062 s | 6.185 s +- 0.076 s | 100.2% l-d-r | x | | 274.5 ms +- 10.0 ms | 272.1 ms +- 6.2 ms | 99.1% l-d-r | x | x | 4.835 s +- 0.056 s | 4.826 s +- 0.034 s | 99.8% status --change . --copies: repo | N | T | before (mean +- stdev) | after (mean +- stdev) | % of before ------+---+---+------------------------+-----------------------+------------ m-u | | | 214.4 ms +- 1.4 ms | 212.2 ms +- 1.7 ms | 99.0% m-u | | x | 130.9 ms +- 1.2 ms | 131.7 ms +- 1.1 ms | 100.6% m-u | x | | 215.0 ms +- 2.1 ms | 214.9 ms +- 2.7 ms | 100.0% m-u | x | x | 109.5 ms +- 2.3 ms | 107.8 ms +- 0.9 ms | 98.4% l-d-r | | | 79.6 ms +- 0.9 ms | 79.8 ms +- 1.6 ms | 100.3% l-d-r | | x | 3.799 s +- 0.037 s | 3.928 s +- 0.021 s | 103.4% <--? l-d-r | x | | 82.7 ms +- 0.7 ms | 83.2 ms +- 1.0 ms | 100.6% l-d-r | x | x | 746.8 ms +- 6.1 ms | 739.0 ms +- 4.2 ms | 99.0% status --copies: repo | N | T | before (mean +- stdev) | after (mean +- stdev) | % of before ------+---+---+------------------------+-----------------------+------------ m-u | | | 1.884 s +- 0.012 s | 1.885 s +- 0.013 s | 100.1% m-u | | x | 1.897 s +- 0.027 s | 1.909 s +- 0.077 s | 100.6% m-u | x | | 1.886 s +- 0.021 s | 1.891 s +- 0.030 s | 100.3% m-u | x | x | 92.0 ms +- 0.7 ms | 92.4 ms +- 0.4 ms | 100.4% l-d-r | | | 570.3 ms +- 18.7 ms | 552.2 ms +- 4.5 ms | 96.8% l-d-r | | x | 568.9 ms +- 16.1 ms | 567.2 ms +- 11.9 ms | 99.7% l-d-r | x | | 171.1 ms +- 2.5 ms | 170.4 ms +- 1.2 ms | 99.6% l-d-r | x | x | 171.6 ms +- 3.4 ms | 171.5 ms +- 1.7 ms | 99.9% update $rev^; ~/src/hg/hg{hg}/hg update $rev: repo | N | T | before (mean +- stdev) | after (mean +- stdev) | % of before ------+---+---+------------------------+-----------------------+------------ m-u | | | 3.107 s +- 0.017 s | 3.116 s +- 0.012 s | 100.3% m-u | | x | 2.943 s +- 0.010 s | 2.945 s +- 0.019 s | 100.1% m-u | x | | 3.116 s +- 0.033 s | 3.118 s +- 0.027 s | 100.1% m-u | x | x | 318.5 ms +- 2.7 ms | 320.8 ms +- 4.8 ms | 100.7% l-d-r | | | 428.9 ms +- 4.4 ms | 429.5 ms +- 4.0 ms | 100.1% l-d-r | | x | 9.593 s +- 0.081 s | 9.869 s +- 0.043 s | 102.9% l-d-r | x | | 253.2 ms +- 3.6 ms | 254.0 ms +- 2.8 ms | 100.3% l-d-r | x | x | 1.613 s +- 0.009 s | 1.630 s +- 0.017 s | 101.1% Differential Revision: https://phab.mercurial-scm.org/D4587
Rodrigo Damazio Bovendorp - - Load All Authors

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flags.txt
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Most Mercurial commands accept various flags.
Flag names
==========
Flags for each command are listed in :hg:`help` for that command.
Additionally, some flags, such as --repository, are global and can be used with
any command - those are seen in :hg:`help -v`, and can be specified before or
after the command.
Every flag has at least a long name, such as --repository. Some flags may also
have a short one-letter name, such as the equivalent -R. Using the short or long
name is equivalent and has the same effect.
Flags that have a short name can also be bundled together - for instance, to
specify both --edit (short -e) and --interactive (short -i), one could use::
hg commit -ei
If any of the bundled flags takes a value (i.e. is not a boolean), it must be
last, followed by the value::
hg commit -im 'Message'
Flag types
==========
Mercurial command-line flags can be strings, numbers, booleans, or lists of
strings.
Specifying flag values
======================
The following syntaxes are allowed, assuming a flag 'flagname' with short name
'f'::
--flagname=foo
--flagname foo
-f foo
-ffoo
This syntax applies to all non-boolean flags (strings, numbers or lists).
Specifying boolean flags
========================
Boolean flags do not take a value parameter. To specify a boolean, use the flag
name to set it to true, or the same name prefixed with 'no-' to set it to
false::
hg commit --interactive
hg commit --no-interactive
Specifying list flags
=====================
List flags take multiple values. To specify them, pass the flag multiple times::
hg files --include mercurial --include tests
Setting flag defaults
=====================
In order to set a default value for a flag in an hgrc file, it is recommended to
use aliases::
[alias]
commit = commit --interactive
For more information on hgrc files, see :hg:`help config`.
Overriding flags on the command line
====================================
If the same non-list flag is specified multiple times on the command line, the
latest specification is used::
hg commit -m "Ignored value" -m "Used value"
This includes the use of aliases - e.g., if one has::
[alias]
committemp = commit -m "Ignored value"
then the following command will override that -m::
hg committemp -m "Used value"
Overriding flag defaults
========================
Every flag has a default value, and you may also set your own defaults in hgrc
as described above.
Except for list flags, defaults can be overridden on the command line simply by
specifying the flag in that location.
Hidden flags
============
Some flags are not shown in a command's help by default - specifically, those
that are deemed to be experimental, deprecated or advanced. To show all flags,
add the --verbose flag for the help command::
hg help --verbose commit