setdiscovery: stop limiting the number of local head we initially send
In our testing this limitation provides now real gain and instead triggers
pathological discovery timing for some repository with many heads.
See inline documentation for details.
Some timing below:
Mozilla try repository, (~1M revs, ~35K heads), discovery between 2 clones with
100 head missing on each side
before:
! wall 1.492111 comb 1.490000 user 1.450000 sys 0.040000 (best of 20)
! wall 1.813992 comb 1.820000 user 1.700000 sys 0.120000 (max of 20)
! wall 1.574326 comb 1.573500 user 1.522000 sys 0.051500 (avg of 20)
! wall 1.572583 comb 1.570000 user 1.520000 sys 0.050000 (median of 20)
after:
! wall 1.147834 comb 1.150000 user 1.090000 sys 0.060000 (best of 20)
! wall 1.449144 comb 1.450000 user 1.330000 sys 0.120000 (max of 20)
! wall 1.204618 comb 1.202500 user 1.146500 sys 0.056000 (avg of 20)
! wall 1.194407 comb 1.190000 user 1.140000 sys 0.050000 (median of 20)
pypy (~100 heads, 317 heads) discovery between clones with only 42 common heads
before:
! wall 0.031653 comb 0.030000 user 0.030000 sys 0.000000 (best of 25)
! wall 0.055719 comb 0.050000 user 0.040000 sys 0.010000 (max of 25)
! wall 0.038939 comb 0.039600 user 0.038400 sys 0.001200 (avg of 25)
! wall 0.038660 comb 0.050000 user 0.040000 sys 0.010000 (median of 25)
after:
! wall 0.018754 comb 0.020000 user 0.020000 sys 0.000000 (best of 49)
! wall 0.034505 comb 0.040000 user 0.030000 sys 0.010000 (max of 49)
! wall 0.019631 comb 0.019796 user 0.018367 sys 0.001429 (avg of 49)
! wall 0.019132 comb 0.020000 user 0.020000 sys 0.000000 (median of 49)
Private repository (~1M revs, ~3K heads), discovery from a strip subset, about
100 changesets to be pulled.
before:
! wall 1.837729 comb 1.840000 user 1.790000 sys 0.050000 (best of 20)
! wall 2.203468 comb 2.200000 user 2.100000 sys 0.100000 (max of 20)
! wall 2.049355 comb 2.048500 user 2.002500 sys 0.046000 (avg of 20)
! wall 2.035315 comb 2.040000 user 2.000000 sys 0.040000 (median of 20)
after:
! wall 0.136598 comb 0.130000 user 0.110000 sys 0.020000 (best of 20)
! wall 0.330519 comb 0.330000 user 0.260000 sys 0.070000 (max of 20)
! wall 0.157254 comb 0.155500 user 0.123000 sys 0.032500 (avg of 20)
! wall 0.149870 comb 0.140000 user 0.110000 sys 0.030000 (median of 20)
Same private repo, discovery between two clone with 500 different heads on each
side:
before:
! wall 2.372919 comb 2.370000 user 2.320000 sys 0.050000 (best of 20)
! wall 2.622422 comb 2.610000 user 2.510000 sys 0.100000 (max of 20)
! wall 2.450135 comb 2.450000 user 2.402000 sys 0.048000 (avg of 20)
! wall 2.443896 comb 2.450000 user 2.410000 sys 0.040000 (median of 20)
after:
! wall 0.625497 comb 0.620000 user 0.570000 sys 0.050000 (best of 20)
! wall 0.834723 comb 0.820000 user 0.730000 sys 0.090000 (max of 20)
! wall 0.675725 comb 0.675500 user 0.628000 sys 0.047500 (avg of 20)
! wall 0.671614 comb 0.680000 user 0.640000 sys 0.040000 (median of 20)
$ hg init a
$ cd a
$ echo a > a
$ hg ci -A -d'1 0' -m a
adding a
$ cd ..
$ hg init b
$ cd b
$ echo b > b
$ hg ci -A -d'1 0' -m b
adding b
$ cd ..
$ hg clone a c
updating to branch default
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ cd c
$ cat >> .hg/hgrc <<EOF
> [paths]
> relative = ../a
> EOF
$ hg pull -f ../b
pulling from ../b
searching for changes
warning: repository is unrelated
requesting all changes
adding changesets
adding manifests
adding file changes
added 1 changesets with 1 changes to 1 files (+1 heads)
new changesets b6c483daf290
(run 'hg heads' to see heads, 'hg merge' to merge)
$ hg merge
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
(branch merge, don't forget to commit)
$ cd ..
Testing -R/--repository:
$ hg -R a tip
changeset: 0:8580ff50825a
tag: tip
user: test
date: Thu Jan 01 00:00:01 1970 +0000
summary: a
$ hg --repository b tip
changeset: 0:b6c483daf290
tag: tip
user: test
date: Thu Jan 01 00:00:01 1970 +0000
summary: b
-R with a URL:
$ hg -R file:a identify
8580ff50825a tip
$ hg -R file://localhost/`pwd`/a/ identify
8580ff50825a tip
-R with path aliases:
$ cd c
$ hg -R default identify
8580ff50825a tip
$ hg -R relative identify
8580ff50825a tip
$ echo '[paths]' >> $HGRCPATH
$ echo 'relativetohome = a' >> $HGRCPATH
$ HOME=`pwd`/../ hg -R relativetohome identify
8580ff50825a tip
$ cd ..
#if no-outer-repo
Implicit -R:
$ hg ann a/a
0: a
$ hg ann a/a a/a
0: a
$ hg ann a/a b/b
abort: no repository found in '$TESTTMP' (.hg not found)!
[255]
$ hg -R b ann a/a
abort: a/a not under root '$TESTTMP/b'
(consider using '--cwd b')
[255]
$ hg log
abort: no repository found in '$TESTTMP' (.hg not found)!
[255]
#endif
Abbreviation of long option:
$ hg --repo c tip
changeset: 1:b6c483daf290
tag: tip
parent: -1:000000000000
user: test
date: Thu Jan 01 00:00:01 1970 +0000
summary: b
earlygetopt with duplicate options (36d23de02da1):
$ hg --cwd a --cwd b --cwd c tip
changeset: 1:b6c483daf290
tag: tip
parent: -1:000000000000
user: test
date: Thu Jan 01 00:00:01 1970 +0000
summary: b
$ hg --repo c --repository b -R a tip
changeset: 0:8580ff50825a
tag: tip
user: test
date: Thu Jan 01 00:00:01 1970 +0000
summary: a
earlygetopt short option without following space:
$ hg -q -Rb tip
0:b6c483daf290
earlygetopt with illegal abbreviations:
$ hg --confi "foo.bar=baz"
abort: option --config may not be abbreviated!
[255]
$ hg --cw a tip
abort: option --cwd may not be abbreviated!
[255]
$ hg --rep a tip
abort: option -R has to be separated from other options (e.g. not -qR) and --repository may only be abbreviated as --repo!
[255]
$ hg --repositor a tip
abort: option -R has to be separated from other options (e.g. not -qR) and --repository may only be abbreviated as --repo!
[255]
$ hg -qR a tip
abort: option -R has to be separated from other options (e.g. not -qR) and --repository may only be abbreviated as --repo!
[255]
$ hg -qRa tip
abort: option -R has to be separated from other options (e.g. not -qR) and --repository may only be abbreviated as --repo!
[255]
Testing --cwd:
$ hg --cwd a parents
changeset: 0:8580ff50825a
tag: tip
user: test
date: Thu Jan 01 00:00:01 1970 +0000
summary: a
Testing -y/--noninteractive - just be sure it is parsed:
$ hg --cwd a tip -q --noninteractive
0:8580ff50825a
$ hg --cwd a tip -q -y
0:8580ff50825a
Testing -q/--quiet:
$ hg -R a -q tip
0:8580ff50825a
$ hg -R b -q tip
0:b6c483daf290
$ hg -R c --quiet parents
0:8580ff50825a
1:b6c483daf290
Testing -v/--verbose:
$ hg --cwd c head -v
changeset: 1:b6c483daf290
tag: tip
parent: -1:000000000000
user: test
date: Thu Jan 01 00:00:01 1970 +0000
files: b
description:
b
changeset: 0:8580ff50825a
user: test
date: Thu Jan 01 00:00:01 1970 +0000
files: a
description:
a
$ hg --cwd b tip --verbose
changeset: 0:b6c483daf290
tag: tip
user: test
date: Thu Jan 01 00:00:01 1970 +0000
files: b
description:
b
Testing --config:
$ hg --cwd c --config paths.quuxfoo=bar paths | grep quuxfoo > /dev/null && echo quuxfoo
quuxfoo
$ hg --cwd c --config '' tip -q
abort: malformed --config option: '' (use --config section.name=value)
[255]
$ hg --cwd c --config a.b tip -q
abort: malformed --config option: 'a.b' (use --config section.name=value)
[255]
$ hg --cwd c --config a tip -q
abort: malformed --config option: 'a' (use --config section.name=value)
[255]
$ hg --cwd c --config a.= tip -q
abort: malformed --config option: 'a.=' (use --config section.name=value)
[255]
$ hg --cwd c --config .b= tip -q
abort: malformed --config option: '.b=' (use --config section.name=value)
[255]
Testing --debug:
$ hg --cwd c log --debug
changeset: 1:b6c483daf2907ce5825c0bb50f5716226281cc1a
tag: tip
phase: public
parent: -1:0000000000000000000000000000000000000000
parent: -1:0000000000000000000000000000000000000000
manifest: 1:23226e7a252cacdc2d99e4fbdc3653441056de49
user: test
date: Thu Jan 01 00:00:01 1970 +0000
files+: b
extra: branch=default
description:
b
changeset: 0:8580ff50825a50c8f716709acdf8de0deddcd6ab
phase: public
parent: -1:0000000000000000000000000000000000000000
parent: -1:0000000000000000000000000000000000000000
manifest: 0:a0c8bcbbb45c63b90b70ad007bf38961f64f2af0
user: test
date: Thu Jan 01 00:00:01 1970 +0000
files+: a
extra: branch=default
description:
a
Testing --traceback:
#if no-chg
$ hg --cwd c --config x --traceback id 2>&1 | grep -i 'traceback'
Traceback (most recent call last):
Traceback (most recent call last): (py3 !)
#else
Traceback for '--config' errors not supported with chg.
$ hg --cwd c --config x --traceback id 2>&1 | grep -i 'traceback'
[1]
#endif
Testing --time:
$ hg --cwd a --time id
8580ff50825a tip
time: real * (glob)
Testing --version:
$ hg --version -q
Mercurial Distributed SCM * (glob)
hide outer repo
$ hg init
Testing -h/--help:
#if no-extraextensions
$ hg -h
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 revision history 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
status show changed files in the working directory
summary summarize working directory state
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)
$ hg --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 revision history 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
status show changed files in the working directory
summary summarize working directory state
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)
#endif
Not tested: --debugger