mercurial/exthelper.py
author |
Pierre-Yves David <pierre-yves.david@octobus.net> |
|
Wed, 27 Mar 2019 18:35:59 +0100 |
changeset 42044 |
bb271ec2fbfb |
parent 41279 |
c9e1104e6272
|
child 42316 |
c07dcf7a0247 |
permissions |
-rw-r--r-- |
compression: introduce a `storage.revlog.zstd.level` configuration
This option control the zstd compression level used when compressing revlog
chunk. The usage of zstd for revlog compression has not graduated from
experimental yet, but we intend to fix that soon.
The option name for the compression level is more straight forward to pick, so
this changesets comes first. Having a dedicated option for each compression
engine is useful because they don't support the same range of values.
I ran the same measurement as for the zlib compression level (in the parent
changesets). The variation in repository size is stay mostly in the same (small)
range. The "read/write" performance see smallish variation, but are overall much
better than zlib. Write performance show the same tend of having better write
performance for when reaching high-end compression.
Again, we don't intend to change the default zstd compression level (currently:
3) in this series. However this is worth investigating in the future.
The Performance comparison of zlib vs zstd is quite impressive. The repository
size stay in the same range, but the performance are much better in all
situations.
Comparison summary
==================
We are looking at:
- performance range for zlib
- performance range for zstd
- comparison of default zstd (level-3) to default zlib (level 6)
- comparison of the slowest zstd time to the fastest zlib time
Read performance:
-----------------
| zlib | zstd | cmp | f2s
mercurial | 0.170159 - 0.189219 | 0.144127 - 0.149624 | 80% | 88%
pypy | 2.679217 - 2.768691 | 1.532317 - 1.705044 | 60% | 63%
netbeans | 122.477027 - 141.620281 | 72.996346 - 89.731560 | 58% | 73%
mozilla | 147.867662 - 170.572118 | 91.700995 - 105.853099 | 56% | 71%
Write performance:
------------------
| zlib | zstd | cmp | f2s
mercurial | 53.250304 - 56.2936129 | 40.877025 - 45.677286 | 75% | 86%
pypy | 460.721984 - 476.589918 | 270.545409 - 301.002219 | 63% | 65%
netbeans | 520.560316 - 715.930400 | 370.356311 - 428.329652 | 55% | 82%
mozilla | 739.803002 - 987.056093 | 505.152906 - 591.930683 | 57% | 80%
Raw data
--------
repo alg lvl .hg/store size 00manifest.d read write
mercurial zlib 1 49,402,813 5,963,475 0.170159 53.250304
mercurial zlib 6 47,197,397 5,875,730 0.182820 56.264320
mercurial zlib 9 47,121,596 5,849,781 0.189219 56.293612
mercurial zstd 1 49,737,084 5,966,355 0.144127 40.877025
mercurial zstd 3 48,961,867 5,895,208 0.146376 42.268142
mercurial zstd 5 48,200,592 5,938,676 0.149624 43.162875
mercurial zstd 10 47,833,520 5,913,353 0.145185 44.012489
mercurial zstd 15 47,314,604 5,728,679 0.147686 45.677286
mercurial zstd 20 47,330,502 5,830,539 0.145789 45.025407
mercurial zstd 22 47,330,076 5,830,539 0.143996 44.690460
pypy zlib 1 370,830,572 28,462,425 2.679217 460.721984
pypy zlib 6 340,112,317 27,648,747 2.768691 467.537158
pypy zlib 9 338,360,736 27,639,003 2.763495 476.589918
pypy zstd 1 362,377,479 27,916,214 1.532317 270.545409
pypy zstd 3 354,137,693 27,905,988 1.686718 294.951509
pypy zstd 5 342,640,043 27,655,774 1.705044 301.002219
pypy zstd 10 334,224,327 27,164,493 1.567287 285.186239
pypy zstd 15 329,000,363 26,645,965 1.637729 299.561332
pypy zstd 20 324,534,039 26,199,547 1.526813 302.149827
pypy zstd 22 324,530,595 26,198,932 1.525718 307.821218
netbeans zlib 1 1,281,847,810 165,495,457 122.477027 520.560316
netbeans zlib 6 1,205,284,353 159,161,207 139.876147 715.930400
netbeans zlib 9 1,197,135,671 155,034,586 141.620281 678.297064
netbeans zstd 1 1,259,581,737 160,840,613 72.996346 370.356311
netbeans zstd 3 1,232,978,122 157,691,551 81.622317 396.733087
netbeans zstd 5 1,208,034,075 160,246,880 83.080549 364.342626
netbeans zstd 10 1,188,624,176 156,083,417 79.323935 403.594602
netbeans zstd 15 1,176,973,589 153,859,477 89.731560 428.329652
netbeans zstd 20 1,162,958,258 151,147,535 82.842667 392.335349
netbeans zstd 22 1,162,707,029 151,150,220 82.565695 402.840655
mozilla zlib 1 2,775,497,186 298,527,987 147.867662 751.263721
mozilla zlib 6 2,596,856,420 286,597,671 170.572118 987.056093
mozilla zlib 9 2,587,542,494 287,018,264 163.622338 739.803002
mozilla zstd 1 2,723,159,348 286,617,532 91.700995 570.042751
mozilla zstd 3 2,665,055,001 286,152,013 95.240155 561.412805
mozilla zstd 5 2,607,819,817 288,060,030 101.978048 505.152906
mozilla zstd 10 2,558,761,085 283,967,648 104.113481 497.771202
mozilla zstd 15 2,526,216,060 275,581,300 105.853099 591.930683
mozilla zstd 20 2,485,114,806 266,478,859 95.268795 576.515389
mozilla zstd 22 2,484,869,080 266,456,505 94.429282 572.785537
# Copyright 2012 Logilab SA <contact@logilab.fr>
# Pierre-Yves David <pierre-yves.david@ens-lyon.org>
# Octobus <contact@octobus.net>
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.
#####################################################################
### Extension helper ###
#####################################################################
from __future__ import absolute_import
from . import (
commands,
error,
extensions,
registrar,
)
class exthelper(object):
"""Helper for modular extension setup
A single helper should be instantiated for each module of an
extension, where a command or function needs to be wrapped, or a
command, extension hook, fileset, revset or template needs to be
registered. Helper methods are then used as decorators for
these various purposes. If an extension spans multiple modules,
all helper instances should be merged in the main module.
All decorators return the original function and may be chained.
Aside from the helper functions with examples below, several
registrar method aliases are available for adding commands,
configitems, filesets, revsets, and templates. Simply decorate
the appropriate methods, and assign the corresponding exthelper
variable to a module level variable of the extension. The
extension loading mechanism will handle the rest.
example::
# ext.py
eh = exthelper.exthelper()
# As needed:
cmdtable = eh.cmdtable
configtable = eh.configtable
filesetpredicate = eh.filesetpredicate
revsetpredicate = eh.revsetpredicate
templatekeyword = eh.templatekeyword
@eh.command('mynewcommand',
[('r', 'rev', [], _('operate on these revisions'))],
_('-r REV...'),
helpcategory=command.CATEGORY_XXX)
def newcommand(ui, repo, *revs, **opts):
# implementation goes here
eh.configitem('experimental', 'foo',
default=False,
)
@eh.filesetpredicate('lfs()')
def filesetbabar(mctx, x):
return mctx.predicate(...)
@eh.revsetpredicate('hidden')
def revsetbabar(repo, subset, x):
args = revset.getargs(x, 0, 0, 'babar accept no argument')
return [r for r in subset if 'babar' in repo[r].description()]
@eh.templatekeyword('babar')
def kwbabar(ctx):
return 'babar'
"""
def __init__(self):
self._uipopulatecallables = []
self._uicallables = []
self._extcallables = []
self._repocallables = []
self._commandwrappers = []
self._extcommandwrappers = []
self._functionwrappers = []
self.cmdtable = {}
self.command = registrar.command(self.cmdtable)
self.configtable = {}
self.configitem = registrar.configitem(self.configtable)
self.filesetpredicate = registrar.filesetpredicate()
self.revsetpredicate = registrar.revsetpredicate()
self.templatekeyword = registrar.templatekeyword()
def merge(self, other):
self._uicallables.extend(other._uicallables)
self._uipopulatecallables.extend(other._uipopulatecallables)
self._extcallables.extend(other._extcallables)
self._repocallables.extend(other._repocallables)
self.filesetpredicate._merge(other.filesetpredicate)
self.revsetpredicate._merge(other.revsetpredicate)
self.templatekeyword._merge(other.templatekeyword)
self._commandwrappers.extend(other._commandwrappers)
self._extcommandwrappers.extend(other._extcommandwrappers)
self._functionwrappers.extend(other._functionwrappers)
self.cmdtable.update(other.cmdtable)
for section, items in other.configtable.iteritems():
if section in self.configtable:
self.configtable[section].update(items)
else:
self.configtable[section] = items
def finaluisetup(self, ui):
"""Method to be used as the extension uisetup
The following operations belong here:
- Changes to ui.__class__ . The ui object that will be used to run the
command has not yet been created. Changes made here will affect ui
objects created after this, and in particular the ui that will be
passed to runcommand
- Command wraps (extensions.wrapcommand)
- Changes that need to be visible to other extensions: because
initialization occurs in phases (all extensions run uisetup, then all
run extsetup), a change made here will be visible to other extensions
during extsetup
- Monkeypatch or wrap function (extensions.wrapfunction) of dispatch
module members
- Setup of pre-* and post-* hooks
- pushkey setup
"""
for command, wrapper, opts in self._commandwrappers:
entry = extensions.wrapcommand(commands.table, command, wrapper)
if opts:
for opt in opts:
entry[1].append(opt)
for cont, funcname, wrapper in self._functionwrappers:
extensions.wrapfunction(cont, funcname, wrapper)
for c in self._uicallables:
c(ui)
def finaluipopulate(self, ui):
"""Method to be used as the extension uipopulate
This is called once per ui instance to:
- Set up additional ui members
- Update configuration by ``ui.setconfig()``
- Extend the class dynamically
"""
for c in self._uipopulatecallables:
c(ui)
def finalextsetup(self, ui):
"""Method to be used as a the extension extsetup
The following operations belong here:
- Changes depending on the status of other extensions. (if
extensions.find('mq'))
- Add a global option to all commands
"""
knownexts = {}
for ext, command, wrapper, opts in self._extcommandwrappers:
if ext not in knownexts:
try:
e = extensions.find(ext)
except KeyError:
# Extension isn't enabled, so don't bother trying to wrap
# it.
continue
knownexts[ext] = e.cmdtable
entry = extensions.wrapcommand(knownexts[ext], command, wrapper)
if opts:
for opt in opts:
entry[1].append(opt)
for c in self._extcallables:
c(ui)
def finalreposetup(self, ui, repo):
"""Method to be used as the extension reposetup
The following operations belong here:
- All hooks but pre-* and post-*
- Modify configuration variables
- Changes to repo.__class__, repo.dirstate.__class__
"""
for c in self._repocallables:
c(ui, repo)
def uisetup(self, call):
"""Decorated function will be executed during uisetup
example::
@eh.uisetup
def setupbabar(ui):
print 'this is uisetup!'
"""
self._uicallables.append(call)
return call
def uipopulate(self, call):
"""Decorated function will be executed during uipopulate
example::
@eh.uipopulate
def setupfoo(ui):
print 'this is uipopulate!'
"""
self._uipopulatecallables.append(call)
return call
def extsetup(self, call):
"""Decorated function will be executed during extsetup
example::
@eh.extsetup
def setupcelestine(ui):
print 'this is extsetup!'
"""
self._extcallables.append(call)
return call
def reposetup(self, call):
"""Decorated function will be executed during reposetup
example::
@eh.reposetup
def setupzephir(ui, repo):
print 'this is reposetup!'
"""
self._repocallables.append(call)
return call
def wrapcommand(self, command, extension=None, opts=None):
"""Decorated function is a command wrapper
The name of the command must be given as the decorator argument.
The wrapping is installed during `uisetup`.
If the second option `extension` argument is provided, the wrapping
will be applied in the extension commandtable. This argument must be a
string that will be searched using `extension.find` if not found and
Abort error is raised. If the wrapping applies to an extension, it is
installed during `extsetup`.
example::
@eh.wrapcommand('summary')
def wrapsummary(orig, ui, repo, *args, **kwargs):
ui.note('Barry!')
return orig(ui, repo, *args, **kwargs)
The `opts` argument allows specifying a list of tuples for additional
arguments for the command. See ``mercurial.fancyopts.fancyopts()`` for
the format of the tuple.
"""
if opts is None:
opts = []
else:
for opt in opts:
if not isinstance(opt, tuple):
raise error.ProgrammingError('opts must be list of tuples')
if len(opt) not in (4, 5):
msg = 'each opt tuple must contain 4 or 5 values'
raise error.ProgrammingError(msg)
def dec(wrapper):
if extension is None:
self._commandwrappers.append((command, wrapper, opts))
else:
self._extcommandwrappers.append((extension, command, wrapper,
opts))
return wrapper
return dec
def wrapfunction(self, container, funcname):
"""Decorated function is a function wrapper
This function takes two arguments, the container and the name of the
function to wrap. The wrapping is performed during `uisetup`.
(there is no extension support)
example::
@eh.function(discovery, 'checkheads')
def wrapfunction(orig, *args, **kwargs):
ui.note('His head smashed in and his heart cut out')
return orig(*args, **kwargs)
"""
def dec(wrapper):
self._functionwrappers.append((container, funcname, wrapper))
return wrapper
return dec