localrepo: introduce shared method to check if a repository is shared
Up until now we compared the "path" and "sharedpath" repository properties to
check if a repository is shared. This was relying an implementation detail of
shared repositories. In order to make it possible to change the way shared
repositories are implemented, we encapsulate this check into its own localrepo
method, called shared.
This new method returns None if the repository is shared, and something else
(for now a string describing the short of share) otherwise.
The reason why I did not call this method "isshared" and made it return a
boolean is that I plan to introduce a new type of shared repository soon.
# NOTES:
This is the first patch in a series whose purpose is to add support for
creating "full repository shares", which are repositories that share everything
with the repository source except their current revision, branch and bookmark.
This series is RFC because I am not very sure of some of the solutions I took.
Comments are welcome!
# perf.py - performance test routines
'''helper extension to measure performance'''
from mercurial import cmdutil, scmutil, util, commands, obsolete
from mercurial import repoview, branchmap, merge, copies
import time, os, sys
import functools
cmdtable = {}
command = cmdutil.command(cmdtable)
def gettimer(ui, opts=None):
"""return a timer function and formatter: (timer, formatter)
This functions exist to gather the creation of formatter in a single
place instead of duplicating it in all performance command."""
if opts is None:
opts = {}
# redirect all to stderr
ui = ui.copy()
ui.fout = ui.ferr
# get a formatter
fm = ui.formatter('perf', opts)
return functools.partial(_timer, fm), fm
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')
def perfwalk(ui, repo, *pats):
timer, fm = gettimer(ui)
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')
def perfannotate(ui, repo, f):
timer, fm = gettimer(ui)
fc = repo['.'][f]
timer(lambda: len(fc.annotate(True)))
fm.end()
@command('perfstatus',
[('u', 'unknown', False,
'ask status to look for unknown files')])
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)
timer(lambda: sum(map(len, repo.status(**opts))))
fm.end()
@command('perfaddremove')
def perfaddremove(ui, repo):
timer, fm = gettimer(ui)
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')
def perfheads(ui, repo):
timer, fm = gettimer(ui)
cl = repo.changelog
def d():
len(cl.headrevs())
clearcaches(cl)
timer(d)
fm.end()
@command('perftags')
def perftags(ui, repo):
import mercurial.changelog
import mercurial.manifest
timer, fm = gettimer(ui)
def t():
repo.changelog = mercurial.changelog.changelog(repo.sopener)
repo.manifest = mercurial.manifest.manifest(repo.sopener)
repo._tags = None
return len(repo.tags())
timer(t)
fm.end()
@command('perfancestors')
def perfancestors(ui, repo):
timer, fm = gettimer(ui)
heads = repo.changelog.headrevs()
def d():
for a in repo.changelog.ancestors(heads):
pass
timer(d)
fm.end()
@command('perfancestorset')
def perfancestorset(ui, repo, revset):
timer, fm = gettimer(ui)
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')
def perfdirs(ui, repo):
timer, fm = gettimer(ui)
dirstate = repo.dirstate
'a' in dirstate
def d():
dirstate.dirs()
del dirstate._dirs
timer(d)
fm.end()
@command('perfdirstate')
def perfdirstate(ui, repo):
timer, fm = gettimer(ui)
"a" in repo.dirstate
def d():
repo.dirstate.invalidate()
"a" in repo.dirstate
timer(d)
fm.end()
@command('perfdirstatedirs')
def perfdirstatedirs(ui, repo):
timer, fm = gettimer(ui)
"a" in repo.dirstate
def d():
"a" in repo.dirstate._dirs
del repo.dirstate._dirs
timer(d)
fm.end()
@command('perfdirstatefoldmap')
def perffoldmap(ui, repo):
timer, fm = gettimer(ui)
dirstate = repo.dirstate
'a' in dirstate
def d():
dirstate._foldmap.get('a')
del dirstate._foldmap
del dirstate._dirs
timer(d)
fm.end()
@command('perfdirstatewrite')
def perfdirstatewrite(ui, repo):
timer, fm = gettimer(ui)
ds = repo.dirstate
"a" in ds
def d():
ds._dirty = True
ds.write()
timer(d)
fm.end()
@command('perfmergecalculate',
[('r', 'rev', '.', 'rev to merge against')])
def perfmergecalculate(ui, repo, rev):
timer, fm = gettimer(ui)
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, False,
acceptremote=True)
timer(d)
fm.end()
@command('perfpathcopies', [], "REV REV")
def perfpathcopies(ui, repo, rev1, rev2):
timer, fm = gettimer(ui)
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):
timer, fm = gettimer(ui)
ctx = scmutil.revsingle(repo, rev, rev)
t = ctx.manifestnode()
def d():
repo.manifest._mancache.clear()
repo.manifest._cache = None
repo.manifest.read(t)
timer(d)
fm.end()
@command('perfchangeset')
def perfchangeset(ui, repo, rev):
timer, fm = gettimer(ui)
n = repo[rev].node()
def d():
repo.changelog.read(n)
#repo.changelog._cache = None
timer(d)
fm.end()
@command('perfindex')
def perfindex(ui, repo):
import mercurial.revlog
timer, fm = gettimer(ui)
mercurial.revlog._prereadsize = 2**24 # disable lazy parser in old hg
n = repo["tip"].node()
def d():
cl = mercurial.revlog.revlog(repo.sopener, "00changelog.i")
cl.rev(n)
timer(d)
fm.end()
@command('perfstartup')
def perfstartup(ui, repo):
timer, fm = gettimer(ui)
cmd = sys.argv[0]
def d():
os.system("HGRCPATH= %s version -q > /dev/null" % cmd)
timer(d)
fm.end()
@command('perfparents')
def perfparents(ui, repo):
timer, fm = gettimer(ui)
nl = [repo.changelog.node(i) for i in xrange(1000)]
def d():
for n in nl:
repo.changelog.parents(n)
timer(d)
fm.end()
@command('perflookup')
def perflookup(ui, repo, rev):
timer, fm = gettimer(ui)
timer(lambda: len(repo.lookup(rev)))
fm.end()
@command('perfrevrange')
def perfrevrange(ui, repo, *specs):
timer, fm = gettimer(ui)
revrange = scmutil.revrange
timer(lambda: len(revrange(repo, specs)))
fm.end()
@command('perfnodelookup')
def perfnodelookup(ui, repo, rev):
timer, fm = gettimer(ui)
import mercurial.revlog
mercurial.revlog._prereadsize = 2**24 # disable lazy parser in old hg
n = repo[rev].node()
cl = mercurial.revlog.revlog(repo.sopener, "00changelog.i")
def d():
cl.rev(n)
clearcaches(cl)
timer(d)
fm.end()
@command('perflog',
[('', 'rename', False, 'ask log to follow renames')])
def perflog(ui, repo, **opts):
timer, fm = gettimer(ui)
ui.pushbuffer()
timer(lambda: commands.log(ui, repo, rev=[], date='', user='',
copies=opts.get('rename')))
ui.popbuffer()
fm.end()
@command('perfmoonwalk')
def perfmoonwalk(ui, repo):
"""benchmark walking the changelog backwards
This also loads the changelog data for each revision in the changelog.
"""
timer, fm = gettimer(ui)
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')
def perftemplating(ui, repo):
timer, fm = gettimer(ui)
ui.pushbuffer()
timer(lambda: commands.log(ui, repo, rev=[], date='', user='',
template='{date|shortdate} [{rev}:{node|short}]'
' {author|person}: {desc|firstline}\n'))
ui.popbuffer()
fm.end()
@command('perfcca')
def perfcca(ui, repo):
timer, fm = gettimer(ui)
timer(lambda: scmutil.casecollisionauditor(ui, False, repo.dirstate))
fm.end()
@command('perffncacheload')
def perffncacheload(ui, repo):
timer, fm = gettimer(ui)
s = repo.store
def d():
s.fncache._load()
timer(d)
fm.end()
@command('perffncachewrite')
def perffncachewrite(ui, repo):
timer, fm = gettimer(ui)
s = repo.store
s.fncache._load()
def d():
s.fncache._dirty = True
s.fncache.write()
timer(d)
fm.end()
@command('perffncacheencode')
def perffncacheencode(ui, repo):
timer, fm = gettimer(ui)
s = repo.store
s.fncache._load()
def d():
for p in s.fncache.entries:
s.encode(p)
timer(d)
fm.end()
@command('perfdiffwd')
def perfdiffwd(ui, repo):
"""Profile diff of working directory changes"""
timer, fm = gettimer(ui)
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',
[('d', 'dist', 100, 'distance between the revisions')],
"[INDEXFILE]")
def perfrevlog(ui, repo, file_, **opts):
timer, fm = gettimer(ui)
from mercurial import revlog
dist = opts['dist']
def d():
r = revlog.revlog(lambda fn: open(fn, 'rb'), file_)
for x in xrange(0, len(r), dist):
r.revision(r.node(x))
timer(d)
fm.end()
@command('perfrevset',
[('C', 'clear', False, 'clear volatile cache between each call.')],
"REVSET")
def perfrevset(ui, repo, expr, clear=False):
"""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)
def d():
if clear:
repo.invalidatevolatilesets()
for r in repo.revs(expr): pass
timer(d)
fm.end()
@command('perfvolatilesets')
def perfvolatilesets(ui, repo, *names):
"""benchmark the computation of various volatile set
Volatile set computes element related to filtering and obsolescence."""
timer, fm = gettimer(ui)
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'),
])
def perfbranchmap(ui, repo, full=False):
"""benchmark the update of a branchmap
This benchmarks the full repo.branchmap() call with read and write disabled
"""
timer, fm = gettimer(ui)
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.sopener)))
fm.end()