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view tests/test-help-hide.t @ 44363:f7459da77f23
nodemap: introduce an option to use mmap to read the nodemap mapping
The performance and memory benefit is much greater if we don't have to copy all
the data in memory for each information. So we introduce an option (on by
default) to read the data using mmap.
This changeset is the last one definition the API for index support nodemap
data. (they have to be able to use the mmaping).
Below are some benchmark comparing the best we currently have in 5.3 with the
final step of this series (using the persistent nodemap implementation in
Rust). The benchmark run `hg perfindex` with various revset and the following
variants:
Before:
* do not use the persistent nodemap
* use the CPython implementation of the index for nodemap
* use mmapping of the changelog index
After:
* use the MixedIndex Rust code, with the NodeTree object for nodemap access
(still in review)
* use the persistent nodemap data from disk
* access the persistent nodemap data through mmap
* use mmapping of the changelog index
The persistent nodemap greatly speed up most operation on very large
repositories. Some of the previously very fast lookup end up a bit slower because
the persistent nodemap has to be setup. However the absolute slowdown is very
small and won't matters in the big picture.
Here are some numbers (in seconds) for the reference copy of mozilla-try:
Revset Before After abs-change speedup
-10000: 0.004622 0.005532 0.000910 × 0.83
-10: 0.000050 0.000132 0.000082 × 0.37
tip 0.000052 0.000085 0.000033 × 0.61
0 + (-10000:) 0.028222 0.005337 -0.022885 × 5.29
0 0.023521 0.000084 -0.023437 × 280.01
(-10000:) + 0 0.235539 0.005308 -0.230231 × 44.37
(-10:) + :9 0.232883 0.000180 -0.232703 ×1293.79
(-10000:) + (:99) 0.238735 0.005358 -0.233377 × 44.55
:99 + (-10000:) 0.317942 0.005593 -0.312349 × 56.84
:9 + (-10:) 0.313372 0.000179 -0.313193 ×1750.68
:9 0.316450 0.000143 -0.316307 ×2212.93
On smaller repositories, the cost of nodemap related operation is not as big, so
the win is much more modest. Yet it helps shaving a handful of millisecond here
and there.
Here are some numbers (in seconds) for the reference copy of mercurial:
Revset Before After abs-change speedup
-10: 0.000065 0.000097 0.000032 × 0.67
tip 0.000063 0.000078 0.000015 × 0.80
0 0.000561 0.000079 -0.000482 × 7.10
-10000: 0.004609 0.003648 -0.000961 × 1.26
0 + (-10000:) 0.005023 0.003715 -0.001307 × 1.35
(-10:) + :9 0.002187 0.000108 -0.002079 ×20.25
(-10000:) + 0 0.006252 0.003716 -0.002536 × 1.68
(-10000:) + (:99) 0.006367 0.003707 -0.002660 × 1.71
:9 + (-10:) 0.003846 0.000110 -0.003736 ×34.96
:9 0.003854 0.000099 -0.003755 ×38.92
:99 + (-10000:) 0.007644 0.003778 -0.003866 × 2.02
Differential Revision: https://phab.mercurial-scm.org/D7894
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
---|---|
date | Tue, 11 Feb 2020 11:18:52 +0100 |
parents | d782cce137fd |
children | bb3a5c0df06b |
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Test hiding some commands (which also happens to hide an entire category). $ hg --config help.hidden-command.clone=true \ > --config help.hidden-command.init=true help Mercurial Distributed SCM list of commands: Remote repository management: incoming show new changesets found in source outgoing show changesets not found in the destination paths show aliases for remote repositories pull pull changes from the specified source push push changes to the specified destination serve start stand-alone webserver Change creation: commit commit the specified files or all outstanding changes Change manipulation: backout reverse effect of earlier changeset graft copy changes from other branches onto the current branch merge merge another revision into working directory Change organization: bookmarks create a new bookmark or list existing bookmarks branch set or show the current branch name branches list repository named branches phase set or show the current phase name tag add one or more tags for the current or given revision tags list repository tags File content management: annotate show changeset information by line for each file cat output the current or given revision of files copy mark files as copied for the next commit diff diff repository (or selected files) grep search for a pattern in specified files Change navigation: bisect subdivision search of changesets heads show branch heads identify identify the working directory or specified revision log show revision history of entire repository or files Working directory management: add add the specified files on the next commit addremove add all new files, delete all missing files files list tracked files forget forget the specified files on the next commit remove remove the specified files on the next commit rename rename files; equivalent of copy + remove resolve redo merges or set/view the merge status of files revert restore files to their checkout state root print the root (top) of the current working directory shelve save and set aside changes from the working directory status show changed files in the working directory summary summarize working directory state unshelve restore a shelved change to the working directory update update working directory (or switch revisions) Change import/export: archive create an unversioned archive of a repository revision bundle create a bundle file export dump the header and diffs for one or more changesets import import an ordered set of patches unbundle apply one or more bundle files Repository maintenance: manifest output the current or given revision of the project manifest recover roll back an interrupted transaction verify verify the integrity of the repository Help: config show combined config settings from all hgrc files help show help for a given topic or a help overview version output version and copyright information additional help topics: Mercurial identifiers: filesets Specifying File Sets hgignore Syntax for Mercurial Ignore Files patterns File Name Patterns revisions Specifying Revisions urls URL Paths Mercurial output: color Colorizing Outputs dates Date Formats diffs Diff Formats templating Template Usage Mercurial configuration: config Configuration Files environment Environment Variables extensions Using Additional Features flags Command-line flags hgweb Configuring hgweb merge-tools Merge Tools pager Pager Support Concepts: bundlespec Bundle File Formats glossary Glossary phases Working with Phases subrepos Subrepositories Miscellaneous: deprecated Deprecated Features internals Technical implementation topics scripting Using Mercurial from scripts and automation (use 'hg help -v' to show built-in aliases and global options) Test hiding some topics. $ hg --config help.hidden-topic.deprecated=true \ > --config help.hidden-topic.internals=true \ > --config help.hidden-topic.scripting=true help Mercurial Distributed SCM list of commands: Repository creation: clone make a copy of an existing repository init create a new repository in the given directory Remote repository management: incoming show new changesets found in source outgoing show changesets not found in the destination paths show aliases for remote repositories pull pull changes from the specified source push push changes to the specified destination serve start stand-alone webserver Change creation: commit commit the specified files or all outstanding changes Change manipulation: backout reverse effect of earlier changeset graft copy changes from other branches onto the current branch merge merge another revision into working directory Change organization: bookmarks create a new bookmark or list existing bookmarks branch set or show the current branch name branches list repository named branches phase set or show the current phase name tag add one or more tags for the current or given revision tags list repository tags File content management: annotate show changeset information by line for each file cat output the current or given revision of files copy mark files as copied for the next commit diff diff repository (or selected files) grep search for a pattern in specified files Change navigation: bisect subdivision search of changesets heads show branch heads identify identify the working directory or specified revision log show revision history of entire repository or files Working directory management: add add the specified files on the next commit addremove add all new files, delete all missing files files list tracked files forget forget the specified files on the next commit remove remove the specified files on the next commit rename rename files; equivalent of copy + remove resolve redo merges or set/view the merge status of files revert restore files to their checkout state root print the root (top) of the current working directory shelve save and set aside changes from the working directory status show changed files in the working directory summary summarize working directory state unshelve restore a shelved change to the working directory update update working directory (or switch revisions) Change import/export: archive create an unversioned archive of a repository revision bundle create a bundle file export dump the header and diffs for one or more changesets import import an ordered set of patches unbundle apply one or more bundle files Repository maintenance: manifest output the current or given revision of the project manifest recover roll back an interrupted transaction verify verify the integrity of the repository Help: config show combined config settings from all hgrc files help show help for a given topic or a help overview version output version and copyright information additional help topics: Mercurial identifiers: filesets Specifying File Sets hgignore Syntax for Mercurial Ignore Files patterns File Name Patterns revisions Specifying Revisions urls URL Paths Mercurial output: color Colorizing Outputs dates Date Formats diffs Diff Formats templating Template Usage Mercurial configuration: config Configuration Files environment Environment Variables extensions Using Additional Features flags Command-line flags hgweb Configuring hgweb merge-tools Merge Tools pager Pager Support Concepts: bundlespec Bundle File Formats glossary Glossary phases Working with Phases subrepos Subrepositories (use 'hg help -v' to show built-in aliases and global options)