scmutil: add file object wrapper class to check ambiguity at closing
In Mercurial source tree, opening a file in "a"/"a+" mode like below
doesn't specify atomictemp=True for vfs, and this avoids file stat
ambiguity check by atomictempfile.
- writing changes out in revlog layer uses "a+" mode
- truncation in repair.strip() uses "a" mode
- truncation in transaction._playback() uses "a" mode
If steps below occurs at "the same time in sec", all of mtime, ctime
and size are same between (1) and (3).
1. append data to revlog-style file (and close transaction)
2. discard appended data by truncation (strip or rollback)
3. append same size but different data to revlog-style file again
Therefore, cache validation doesn't work after (3) as expected.
This patch adds file object wrapper class checkambigatclosing to check
(and get rid of) ambiguity at closing. It is used by vfs in subsequent
patch.
This is a part of ExactCacheValidationPlan.
https://www.mercurial-scm.org/wiki/ExactCacheValidationPlan
BTW, checkambigatclosing is tested in test-filecache.py, even though
it doesn't use filecache itself, because filecache assumes that file
stat ambiguity never occurs (and there is no another test-*.py related
to filecache).
# perf.py - performance test routines
'''helper extension to measure performance'''
# "historical portability" policy of perf.py:
#
# We have to do:
# - make perf.py "loadable" with as wide Mercurial version as possible
# This doesn't mean that perf commands work correctly with that Mercurial.
# BTW, perf.py itself has been available since 1.1 (or eb240755386d).
# - make historical perf command work correctly with as wide Mercurial
# version as possible
#
# We have to do, if possible with reasonable cost:
# - make recent perf command for historical feature work correctly
# with early Mercurial
#
# We don't have to do:
# - make perf command for recent feature work correctly with early
# Mercurial
from __future__ import absolute_import
import functools
import os
import random
import sys
import time
from mercurial import (
cmdutil,
commands,
copies,
error,
extensions,
mdiff,
merge,
revlog,
util,
)
# for "historical portability":
# try to import modules separately (in dict order), and ignore
# failure, because these aren't available with early Mercurial
try:
from mercurial import branchmap # since 2.5 (or bcee63733aad)
except ImportError:
pass
try:
from mercurial import obsolete # since 2.3 (or ad0d6c2b3279)
except ImportError:
pass
try:
from mercurial import repoview # since 2.5 (or 3a6ddacb7198)
except ImportError:
pass
try:
from mercurial import scmutil # since 1.9 (or 8b252e826c68)
except ImportError:
pass
# for "historical portability":
# define util.safehasattr forcibly, because util.safehasattr has been
# available since 1.9.3 (or 94b200a11cf7)
_undefined = object()
def safehasattr(thing, attr):
return getattr(thing, attr, _undefined) is not _undefined
setattr(util, 'safehasattr', safehasattr)
# for "historical portability":
# use locally defined empty option list, if formatteropts isn't
# available, because commands.formatteropts has been available since
# 3.2 (or 7a7eed5176a4), even though formatting itself has been
# available since 2.2 (or ae5f92e154d3)
formatteropts = getattr(commands, "formatteropts", [])
# for "historical portability":
# use locally defined option list, if debugrevlogopts isn't available,
# because commands.debugrevlogopts has been available since 3.7 (or
# 5606f7d0d063), even though cmdutil.openrevlog() has been available
# since 1.9 (or a79fea6b3e77).
revlogopts = getattr(commands, "debugrevlogopts", [
('c', 'changelog', False, ('open changelog')),
('m', 'manifest', False, ('open manifest')),
('', 'dir', False, ('open directory manifest')),
])
cmdtable = {}
# for "historical portability":
# define parsealiases locally, because cmdutil.parsealiases has been
# available since 1.5 (or 6252852b4332)
def parsealiases(cmd):
return cmd.lstrip("^").split("|")
if safehasattr(cmdutil, 'command'):
import inspect
command = cmdutil.command(cmdtable)
if 'norepo' not in inspect.getargspec(command)[0]:
# for "historical portability":
# wrap original cmdutil.command, because "norepo" option has
# been available since 3.1 (or 75a96326cecb)
_command = command
def command(name, options=(), synopsis=None, norepo=False):
if norepo:
commands.norepo += ' %s' % ' '.join(parsealiases(name))
return _command(name, list(options), synopsis)
else:
# for "historical portability":
# define "@command" annotation locally, because cmdutil.command
# has been available since 1.9 (or 2daa5179e73f)
def command(name, options=(), synopsis=None, norepo=False):
def decorator(func):
if synopsis:
cmdtable[name] = func, list(options), synopsis
else:
cmdtable[name] = func, list(options)
if norepo:
commands.norepo += ' %s' % ' '.join(parsealiases(name))
return func
return decorator
def getlen(ui):
if ui.configbool("perf", "stub"):
return lambda x: 1
return len
def gettimer(ui, opts=None):
"""return a timer function and formatter: (timer, formatter)
This function exists to gather the creation of formatter in a single
place instead of duplicating it in all performance commands."""
# enforce an idle period before execution to counteract power management
# experimental config: perf.presleep
time.sleep(ui.configint("perf", "presleep", 1))
if opts is None:
opts = {}
# redirect all to stderr
ui = ui.copy()
ui.fout = ui.ferr
# get a formatter
fm = ui.formatter('perf', opts)
# stub function, runs code only once instead of in a loop
# experimental config: perf.stub
if ui.configbool("perf", "stub"):
return functools.partial(stub_timer, fm), fm
return functools.partial(_timer, fm), fm
def stub_timer(fm, func, title=None):
func()
def _timer(fm, func, title=None):
results = []
begin = time.time()
count = 0
while True:
ostart = os.times()
cstart = time.time()
r = func()
cstop = time.time()
ostop = os.times()
count += 1
a, b = ostart, ostop
results.append((cstop - cstart, b[0] - a[0], b[1]-a[1]))
if cstop - begin > 3 and count >= 100:
break
if cstop - begin > 10 and count >= 3:
break
fm.startitem()
if title:
fm.write('title', '! %s\n', title)
if r:
fm.write('result', '! result: %s\n', r)
m = min(results)
fm.plain('!')
fm.write('wall', ' wall %f', m[0])
fm.write('comb', ' comb %f', m[1] + m[2])
fm.write('user', ' user %f', m[1])
fm.write('sys', ' sys %f', m[2])
fm.write('count', ' (best of %d)', count)
fm.plain('\n')
@command('perfwalk', formatteropts)
def perfwalk(ui, repo, *pats, **opts):
timer, fm = gettimer(ui, opts)
try:
m = scmutil.match(repo[None], pats, {})
timer(lambda: len(list(repo.dirstate.walk(m, [], True, False))))
except Exception:
try:
m = scmutil.match(repo[None], pats, {})
timer(lambda: len([b for a, b, c in repo.dirstate.statwalk([], m)]))
except Exception:
timer(lambda: len(list(cmdutil.walk(repo, pats, {}))))
fm.end()
@command('perfannotate', formatteropts)
def perfannotate(ui, repo, f, **opts):
timer, fm = gettimer(ui, opts)
fc = repo['.'][f]
timer(lambda: len(fc.annotate(True)))
fm.end()
@command('perfstatus',
[('u', 'unknown', False,
'ask status to look for unknown files')] + formatteropts)
def perfstatus(ui, repo, **opts):
#m = match.always(repo.root, repo.getcwd())
#timer(lambda: sum(map(len, repo.dirstate.status(m, [], False, False,
# False))))
timer, fm = gettimer(ui, opts)
timer(lambda: sum(map(len, repo.status(unknown=opts['unknown']))))
fm.end()
@command('perfaddremove', formatteropts)
def perfaddremove(ui, repo, **opts):
timer, fm = gettimer(ui, opts)
try:
oldquiet = repo.ui.quiet
repo.ui.quiet = True
matcher = scmutil.match(repo[None])
timer(lambda: scmutil.addremove(repo, matcher, "", dry_run=True))
finally:
repo.ui.quiet = oldquiet
fm.end()
def clearcaches(cl):
# behave somewhat consistently across internal API changes
if util.safehasattr(cl, 'clearcaches'):
cl.clearcaches()
elif util.safehasattr(cl, '_nodecache'):
from mercurial.node import nullid, nullrev
cl._nodecache = {nullid: nullrev}
cl._nodepos = None
@command('perfheads', formatteropts)
def perfheads(ui, repo, **opts):
timer, fm = gettimer(ui, opts)
cl = repo.changelog
def d():
len(cl.headrevs())
clearcaches(cl)
timer(d)
fm.end()
@command('perftags', formatteropts)
def perftags(ui, repo, **opts):
import mercurial.changelog
import mercurial.manifest
timer, fm = gettimer(ui, opts)
def t():
repo.changelog = mercurial.changelog.changelog(repo.svfs)
repo.manifest = mercurial.manifest.manifest(repo.svfs)
repo._tags = None
return len(repo.tags())
timer(t)
fm.end()
@command('perfancestors', formatteropts)
def perfancestors(ui, repo, **opts):
timer, fm = gettimer(ui, opts)
heads = repo.changelog.headrevs()
def d():
for a in repo.changelog.ancestors(heads):
pass
timer(d)
fm.end()
@command('perfancestorset', formatteropts)
def perfancestorset(ui, repo, revset, **opts):
timer, fm = gettimer(ui, opts)
revs = repo.revs(revset)
heads = repo.changelog.headrevs()
def d():
s = repo.changelog.ancestors(heads)
for rev in revs:
rev in s
timer(d)
fm.end()
@command('perfdirs', formatteropts)
def perfdirs(ui, repo, **opts):
timer, fm = gettimer(ui, opts)
dirstate = repo.dirstate
'a' in dirstate
def d():
dirstate.dirs()
del dirstate._dirs
timer(d)
fm.end()
@command('perfdirstate', formatteropts)
def perfdirstate(ui, repo, **opts):
timer, fm = gettimer(ui, opts)
"a" in repo.dirstate
def d():
repo.dirstate.invalidate()
"a" in repo.dirstate
timer(d)
fm.end()
@command('perfdirstatedirs', formatteropts)
def perfdirstatedirs(ui, repo, **opts):
timer, fm = gettimer(ui, opts)
"a" in repo.dirstate
def d():
"a" in repo.dirstate._dirs
del repo.dirstate._dirs
timer(d)
fm.end()
@command('perfdirstatefoldmap', formatteropts)
def perfdirstatefoldmap(ui, repo, **opts):
timer, fm = gettimer(ui, opts)
dirstate = repo.dirstate
'a' in dirstate
def d():
dirstate._filefoldmap.get('a')
del dirstate._filefoldmap
timer(d)
fm.end()
@command('perfdirfoldmap', formatteropts)
def perfdirfoldmap(ui, repo, **opts):
timer, fm = gettimer(ui, opts)
dirstate = repo.dirstate
'a' in dirstate
def d():
dirstate._dirfoldmap.get('a')
del dirstate._dirfoldmap
del dirstate._dirs
timer(d)
fm.end()
@command('perfdirstatewrite', formatteropts)
def perfdirstatewrite(ui, repo, **opts):
timer, fm = gettimer(ui, opts)
ds = repo.dirstate
"a" in ds
def d():
ds._dirty = True
ds.write(repo.currenttransaction())
timer(d)
fm.end()
@command('perfmergecalculate',
[('r', 'rev', '.', 'rev to merge against')] + formatteropts)
def perfmergecalculate(ui, repo, rev, **opts):
timer, fm = gettimer(ui, opts)
wctx = repo[None]
rctx = scmutil.revsingle(repo, rev, rev)
ancestor = wctx.ancestor(rctx)
# we don't want working dir files to be stat'd in the benchmark, so prime
# that cache
wctx.dirty()
def d():
# acceptremote is True because we don't want prompts in the middle of
# our benchmark
merge.calculateupdates(repo, wctx, rctx, [ancestor], False, False,
acceptremote=True, followcopies=True)
timer(d)
fm.end()
@command('perfpathcopies', [], "REV REV")
def perfpathcopies(ui, repo, rev1, rev2, **opts):
timer, fm = gettimer(ui, opts)
ctx1 = scmutil.revsingle(repo, rev1, rev1)
ctx2 = scmutil.revsingle(repo, rev2, rev2)
def d():
copies.pathcopies(ctx1, ctx2)
timer(d)
fm.end()
@command('perfmanifest', [], 'REV')
def perfmanifest(ui, repo, rev, **opts):
timer, fm = gettimer(ui, opts)
ctx = scmutil.revsingle(repo, rev, rev)
t = ctx.manifestnode()
def d():
repo.manifest.clearcaches()
repo.manifest.read(t)
timer(d)
fm.end()
@command('perfchangeset', formatteropts)
def perfchangeset(ui, repo, rev, **opts):
timer, fm = gettimer(ui, opts)
n = repo[rev].node()
def d():
repo.changelog.read(n)
#repo.changelog._cache = None
timer(d)
fm.end()
@command('perfindex', formatteropts)
def perfindex(ui, repo, **opts):
import mercurial.revlog
timer, fm = gettimer(ui, opts)
mercurial.revlog._prereadsize = 2**24 # disable lazy parser in old hg
n = repo["tip"].node()
def d():
cl = mercurial.revlog.revlog(repo.svfs, "00changelog.i")
cl.rev(n)
timer(d)
fm.end()
@command('perfstartup', formatteropts)
def perfstartup(ui, repo, **opts):
timer, fm = gettimer(ui, opts)
cmd = sys.argv[0]
def d():
if os.name != 'nt':
os.system("HGRCPATH= %s version -q > /dev/null" % cmd)
else:
os.environ['HGRCPATH'] = ''
os.system("%s version -q > NUL" % cmd)
timer(d)
fm.end()
@command('perfparents', formatteropts)
def perfparents(ui, repo, **opts):
timer, fm = gettimer(ui, opts)
# control the number of commits perfparents iterates over
# experimental config: perf.parentscount
count = ui.configint("perf", "parentscount", 1000)
if len(repo.changelog) < count:
raise error.Abort("repo needs %d commits for this test" % count)
repo = repo.unfiltered()
nl = [repo.changelog.node(i) for i in xrange(count)]
def d():
for n in nl:
repo.changelog.parents(n)
timer(d)
fm.end()
@command('perfctxfiles', formatteropts)
def perfctxfiles(ui, repo, x, **opts):
x = int(x)
timer, fm = gettimer(ui, opts)
def d():
len(repo[x].files())
timer(d)
fm.end()
@command('perfrawfiles', formatteropts)
def perfrawfiles(ui, repo, x, **opts):
x = int(x)
timer, fm = gettimer(ui, opts)
cl = repo.changelog
def d():
len(cl.read(x)[3])
timer(d)
fm.end()
@command('perflookup', formatteropts)
def perflookup(ui, repo, rev, **opts):
timer, fm = gettimer(ui, opts)
timer(lambda: len(repo.lookup(rev)))
fm.end()
@command('perfrevrange', formatteropts)
def perfrevrange(ui, repo, *specs, **opts):
timer, fm = gettimer(ui, opts)
revrange = scmutil.revrange
timer(lambda: len(revrange(repo, specs)))
fm.end()
@command('perfnodelookup', formatteropts)
def perfnodelookup(ui, repo, rev, **opts):
timer, fm = gettimer(ui, opts)
import mercurial.revlog
mercurial.revlog._prereadsize = 2**24 # disable lazy parser in old hg
n = repo[rev].node()
cl = mercurial.revlog.revlog(repo.svfs, "00changelog.i")
def d():
cl.rev(n)
clearcaches(cl)
timer(d)
fm.end()
@command('perflog',
[('', 'rename', False, 'ask log to follow renames')] + formatteropts)
def perflog(ui, repo, rev=None, **opts):
if rev is None:
rev=[]
timer, fm = gettimer(ui, opts)
ui.pushbuffer()
timer(lambda: commands.log(ui, repo, rev=rev, date='', user='',
copies=opts.get('rename')))
ui.popbuffer()
fm.end()
@command('perfmoonwalk', formatteropts)
def perfmoonwalk(ui, repo, **opts):
"""benchmark walking the changelog backwards
This also loads the changelog data for each revision in the changelog.
"""
timer, fm = gettimer(ui, opts)
def moonwalk():
for i in xrange(len(repo), -1, -1):
ctx = repo[i]
ctx.branch() # read changelog data (in addition to the index)
timer(moonwalk)
fm.end()
@command('perftemplating', formatteropts)
def perftemplating(ui, repo, rev=None, **opts):
if rev is None:
rev=[]
timer, fm = gettimer(ui, opts)
ui.pushbuffer()
timer(lambda: commands.log(ui, repo, rev=rev, date='', user='',
template='{date|shortdate} [{rev}:{node|short}]'
' {author|person}: {desc|firstline}\n'))
ui.popbuffer()
fm.end()
@command('perfcca', formatteropts)
def perfcca(ui, repo, **opts):
timer, fm = gettimer(ui, opts)
timer(lambda: scmutil.casecollisionauditor(ui, False, repo.dirstate))
fm.end()
@command('perffncacheload', formatteropts)
def perffncacheload(ui, repo, **opts):
timer, fm = gettimer(ui, opts)
s = repo.store
def d():
s.fncache._load()
timer(d)
fm.end()
@command('perffncachewrite', formatteropts)
def perffncachewrite(ui, repo, **opts):
timer, fm = gettimer(ui, opts)
s = repo.store
s.fncache._load()
lock = repo.lock()
tr = repo.transaction('perffncachewrite')
def d():
s.fncache._dirty = True
s.fncache.write(tr)
timer(d)
lock.release()
tr.close()
fm.end()
@command('perffncacheencode', formatteropts)
def perffncacheencode(ui, repo, **opts):
timer, fm = gettimer(ui, opts)
s = repo.store
s.fncache._load()
def d():
for p in s.fncache.entries:
s.encode(p)
timer(d)
fm.end()
@command('perfdiffwd', formatteropts)
def perfdiffwd(ui, repo, **opts):
"""Profile diff of working directory changes"""
timer, fm = gettimer(ui, opts)
options = {
'w': 'ignore_all_space',
'b': 'ignore_space_change',
'B': 'ignore_blank_lines',
}
for diffopt in ('', 'w', 'b', 'B', 'wB'):
opts = dict((options[c], '1') for c in diffopt)
def d():
ui.pushbuffer()
commands.diff(ui, repo, **opts)
ui.popbuffer()
title = 'diffopts: %s' % (diffopt and ('-' + diffopt) or 'none')
timer(d, title)
fm.end()
@command('perfrevlog', revlogopts + formatteropts +
[('d', 'dist', 100, 'distance between the revisions'),
('s', 'startrev', 0, 'revision to start reading at')],
'-c|-m|FILE')
def perfrevlog(ui, repo, file_=None, startrev=0, **opts):
"""Benchmark reading a series of revisions from a revlog.
By default, we read every ``-d/--dist`` revision from 0 to tip of
the specified revlog.
The start revision can be defined via ``-s/--startrev``.
"""
timer, fm = gettimer(ui, opts)
dist = opts['dist']
_len = getlen(ui)
def d():
r = cmdutil.openrevlog(repo, 'perfrevlog', file_, opts)
for x in xrange(startrev, _len(r), dist):
r.revision(r.node(x))
timer(d)
fm.end()
@command('perfrevlogrevision', revlogopts + formatteropts +
[('', 'cache', False, 'use caches instead of clearing')],
'-c|-m|FILE REV')
def perfrevlogrevision(ui, repo, file_, rev=None, cache=None, **opts):
"""Benchmark obtaining a revlog revision.
Obtaining a revlog revision consists of roughly the following steps:
1. Compute the delta chain
2. Obtain the raw chunks for that delta chain
3. Decompress each raw chunk
4. Apply binary patches to obtain fulltext
5. Verify hash of fulltext
This command measures the time spent in each of these phases.
"""
if opts.get('changelog') or opts.get('manifest'):
file_, rev = None, file_
elif rev is None:
raise error.CommandError('perfrevlogrevision', 'invalid arguments')
r = cmdutil.openrevlog(repo, 'perfrevlogrevision', file_, opts)
node = r.lookup(rev)
rev = r.rev(node)
def dodeltachain(rev):
if not cache:
r.clearcaches()
r._deltachain(rev)
def doread(chain):
if not cache:
r.clearcaches()
r._chunkraw(chain[0], chain[-1])
def dodecompress(data, chain):
if not cache:
r.clearcaches()
start = r.start
length = r.length
inline = r._inline
iosize = r._io.size
buffer = util.buffer
offset = start(chain[0])
for rev in chain:
chunkstart = start(rev)
if inline:
chunkstart += (rev + 1) * iosize
chunklength = length(rev)
b = buffer(data, chunkstart - offset, chunklength)
revlog.decompress(b)
def dopatch(text, bins):
if not cache:
r.clearcaches()
mdiff.patches(text, bins)
def dohash(text):
if not cache:
r.clearcaches()
r._checkhash(text, node, rev)
def dorevision():
if not cache:
r.clearcaches()
r.revision(node)
chain = r._deltachain(rev)[0]
data = r._chunkraw(chain[0], chain[-1])[1]
bins = r._chunks(chain)
text = str(bins[0])
bins = bins[1:]
text = mdiff.patches(text, bins)
benches = [
(lambda: dorevision(), 'full'),
(lambda: dodeltachain(rev), 'deltachain'),
(lambda: doread(chain), 'read'),
(lambda: dodecompress(data, chain), 'decompress'),
(lambda: dopatch(text, bins), 'patch'),
(lambda: dohash(text), 'hash'),
]
for fn, title in benches:
timer, fm = gettimer(ui, opts)
timer(fn, title=title)
fm.end()
@command('perfrevset',
[('C', 'clear', False, 'clear volatile cache between each call.'),
('', 'contexts', False, 'obtain changectx for each revision')]
+ formatteropts, "REVSET")
def perfrevset(ui, repo, expr, clear=False, contexts=False, **opts):
"""benchmark the execution time of a revset
Use the --clean option if need to evaluate the impact of build volatile
revisions set cache on the revset execution. Volatile cache hold filtered
and obsolete related cache."""
timer, fm = gettimer(ui, opts)
def d():
if clear:
repo.invalidatevolatilesets()
if contexts:
for ctx in repo.set(expr): pass
else:
for r in repo.revs(expr): pass
timer(d)
fm.end()
@command('perfvolatilesets', formatteropts)
def perfvolatilesets(ui, repo, *names, **opts):
"""benchmark the computation of various volatile set
Volatile set computes element related to filtering and obsolescence."""
timer, fm = gettimer(ui, opts)
repo = repo.unfiltered()
def getobs(name):
def d():
repo.invalidatevolatilesets()
obsolete.getrevs(repo, name)
return d
allobs = sorted(obsolete.cachefuncs)
if names:
allobs = [n for n in allobs if n in names]
for name in allobs:
timer(getobs(name), title=name)
def getfiltered(name):
def d():
repo.invalidatevolatilesets()
repoview.filterrevs(repo, name)
return d
allfilter = sorted(repoview.filtertable)
if names:
allfilter = [n for n in allfilter if n in names]
for name in allfilter:
timer(getfiltered(name), title=name)
fm.end()
@command('perfbranchmap',
[('f', 'full', False,
'Includes build time of subset'),
] + formatteropts)
def perfbranchmap(ui, repo, full=False, **opts):
"""benchmark the update of a branchmap
This benchmarks the full repo.branchmap() call with read and write disabled
"""
timer, fm = gettimer(ui, opts)
def getbranchmap(filtername):
"""generate a benchmark function for the filtername"""
if filtername is None:
view = repo
else:
view = repo.filtered(filtername)
def d():
if full:
view._branchcaches.clear()
else:
view._branchcaches.pop(filtername, None)
view.branchmap()
return d
# add filter in smaller subset to bigger subset
possiblefilters = set(repoview.filtertable)
allfilters = []
while possiblefilters:
for name in possiblefilters:
subset = branchmap.subsettable.get(name)
if subset not in possiblefilters:
break
else:
assert False, 'subset cycle %s!' % possiblefilters
allfilters.append(name)
possiblefilters.remove(name)
# warm the cache
if not full:
for name in allfilters:
repo.filtered(name).branchmap()
# add unfiltered
allfilters.append(None)
oldread = branchmap.read
oldwrite = branchmap.branchcache.write
try:
branchmap.read = lambda repo: None
branchmap.write = lambda repo: None
for name in allfilters:
timer(getbranchmap(name), title=str(name))
finally:
branchmap.read = oldread
branchmap.branchcache.write = oldwrite
fm.end()
@command('perfloadmarkers')
def perfloadmarkers(ui, repo):
"""benchmark the time to parse the on-disk markers for a repo
Result is the number of markers in the repo."""
timer, fm = gettimer(ui)
timer(lambda: len(obsolete.obsstore(repo.svfs)))
fm.end()
@command('perflrucachedict', formatteropts +
[('', 'size', 4, 'size of cache'),
('', 'gets', 10000, 'number of key lookups'),
('', 'sets', 10000, 'number of key sets'),
('', 'mixed', 10000, 'number of mixed mode operations'),
('', 'mixedgetfreq', 50, 'frequency of get vs set ops in mixed mode')],
norepo=True)
def perflrucache(ui, size=4, gets=10000, sets=10000, mixed=10000,
mixedgetfreq=50, **opts):
def doinit():
for i in xrange(10000):
util.lrucachedict(size)
values = []
for i in xrange(size):
values.append(random.randint(0, sys.maxint))
# Get mode fills the cache and tests raw lookup performance with no
# eviction.
getseq = []
for i in xrange(gets):
getseq.append(random.choice(values))
def dogets():
d = util.lrucachedict(size)
for v in values:
d[v] = v
for key in getseq:
value = d[key]
value # silence pyflakes warning
# Set mode tests insertion speed with cache eviction.
setseq = []
for i in xrange(sets):
setseq.append(random.randint(0, sys.maxint))
def dosets():
d = util.lrucachedict(size)
for v in setseq:
d[v] = v
# Mixed mode randomly performs gets and sets with eviction.
mixedops = []
for i in xrange(mixed):
r = random.randint(0, 100)
if r < mixedgetfreq:
op = 0
else:
op = 1
mixedops.append((op, random.randint(0, size * 2)))
def domixed():
d = util.lrucachedict(size)
for op, v in mixedops:
if op == 0:
try:
d[v]
except KeyError:
pass
else:
d[v] = v
benches = [
(doinit, 'init'),
(dogets, 'gets'),
(dosets, 'sets'),
(domixed, 'mixed')
]
for fn, title in benches:
timer, fm = gettimer(ui, opts)
timer(fn, title=title)
fm.end()
def uisetup(ui):
if (util.safehasattr(cmdutil, 'openrevlog') and
not util.safehasattr(commands, 'debugrevlogopts')):
# for "historical portability":
# In this case, Mercurial should be 1.9 (or a79fea6b3e77) -
# 3.7 (or 5606f7d0d063). Therefore, '--dir' option for
# openrevlog() should cause failure, because it has been
# available since 3.5 (or 49c583ca48c4).
def openrevlog(orig, repo, cmd, file_, opts):
if opts.get('dir') and not util.safehasattr(repo, 'dirlog'):
raise error.Abort("This version doesn't support --dir option",
hint="use 3.5 or later")
return orig(repo, cmd, file_, opts)
extensions.wrapfunction(cmdutil, 'openrevlog', openrevlog)