perf: add perfbranchmap command

The command times the update of a branchmap from its nearest subset
or from scratch.

contrib/perf.py

@@ -1,311 +1,366 b''
 # perf.py - performance test routines
 '''helper extension to measure performance'''
 
 from mercurial import cmdutil, scmutil, util, match, commands, obsolete
-from mercurial import repoview
+from mercurial import repoview, branchmap
 import time, os, sys
 
 cmdtable = {}
 command = cmdutil.command(cmdtable)
 
 def timer(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
     if title:
         sys.stderr.write("! %s\n" % title)
     if r:
         sys.stderr.write("! result: %s\n" % r)
     m = min(results)
     sys.stderr.write("! wall %f comb %f user %f sys %f (best of %d)\n"
                      % (m[0], m[1] + m[2], m[1], m[2], count))
 
 @command('perfwalk')
 def perfwalk(ui, repo, *pats):
     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, {}))))
 
 @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(lambda: sum(map(len, repo.status(**opts))))
 
 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):
     cl = repo.changelog
     def d():
         len(cl.headrevs())
         clearcaches(cl)
     timer(d)
 
 @command('perftags')
 def perftags(ui, repo):
     import mercurial.changelog, mercurial.manifest
     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)
 
 @command('perfancestors')
 def perfancestors(ui, repo):
     heads = repo.changelog.headrevs()
     def d():
         for a in repo.changelog.ancestors(heads):
             pass
     timer(d)
 
 @command('perfancestorset')
 def perfancestorset(ui, repo, revset):
     revs = repo.revs(revset)
     heads = repo.changelog.headrevs()
     def d():
         s = repo.changelog.ancestors(heads)
         for rev in revs:
             rev in s
     timer(d)
 
 @command('perfdirstate')
 def perfdirstate(ui, repo):
     "a" in repo.dirstate
     def d():
         repo.dirstate.invalidate()
         "a" in repo.dirstate
     timer(d)
 
 @command('perfdirstatedirs')
 def perfdirstatedirs(ui, repo):
     "a" in repo.dirstate
     def d():
         "a" in repo.dirstate._dirs
         del repo.dirstate._dirs
     timer(d)
 
 @command('perfdirstatewrite')
 def perfdirstatewrite(ui, repo):
     ds = repo.dirstate
     "a" in ds
     def d():
         ds._dirty = True
         ds.write()
     timer(d)
 
 @command('perfmanifest')
 def perfmanifest(ui, repo):
     def d():
         t = repo.manifest.tip()
         m = repo.manifest.read(t)
         repo.manifest.mapcache = None
         repo.manifest._cache = None
     timer(d)
 
 @command('perfchangeset')
 def perfchangeset(ui, repo, rev):
     n = repo[rev].node()
     def d():
         c = repo.changelog.read(n)
         #repo.changelog._cache = None
     timer(d)
 
 @command('perfindex')
 def perfindex(ui, repo):
     import mercurial.revlog
     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)
 
 @command('perfstartup')
 def perfstartup(ui, repo):
     cmd = sys.argv[0]
     def d():
         os.system("HGRCPATH= %s version -q > /dev/null" % cmd)
     timer(d)
 
 @command('perfparents')
 def perfparents(ui, repo):
     nl = [repo.changelog.node(i) for i in xrange(1000)]
     def d():
         for n in nl:
             repo.changelog.parents(n)
     timer(d)
 
 @command('perflookup')
 def perflookup(ui, repo, rev):
     timer(lambda: len(repo.lookup(rev)))
 
 @command('perfrevrange')
 def perfrevrange(ui, repo, *specs):
     revrange = scmutil.revrange
     timer(lambda: len(revrange(repo, specs)))
 
 @command('perfnodelookup')
 def perfnodelookup(ui, repo, rev):
     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)
 
 @command('perflog',
          [('', 'rename', False, 'ask log to follow renames')])
 def perflog(ui, repo, **opts):
     ui.pushbuffer()
     timer(lambda: commands.log(ui, repo, rev=[], date='', user='',
                                copies=opts.get('rename')))
     ui.popbuffer()
 
 @command('perftemplating')
 def perftemplating(ui, repo):
     ui.pushbuffer()
     timer(lambda: commands.log(ui, repo, rev=[], date='', user='',
                                template='{date|shortdate} [{rev}:{node|short}]'
                                ' {author|person}: {desc|firstline}\n'))
     ui.popbuffer()
 
 @command('perfcca')
 def perfcca(ui, repo):
     timer(lambda: scmutil.casecollisionauditor(ui, False, repo.dirstate))
 
 @command('perffncacheload')
 def perffncacheload(ui, repo):
     s = repo.store
     def d():
         s.fncache._load()
     timer(d)
 
 @command('perffncachewrite')
 def perffncachewrite(ui, repo):
     s = repo.store
     s.fncache._load()
     def d():
         s.fncache._dirty = True
         s.fncache.write()
     timer(d)
 
 @command('perffncacheencode')
 def perffncacheencode(ui, repo):
     s = repo.store
     s.fncache._load()
     def d():
         for p in s.fncache.entries:
             s.encode(p)
     timer(d)
 
 @command('perfdiffwd')
 def perfdiffwd(ui, repo):
     """Profile diff of working directory changes"""
     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)
 
 @command('perfrevlog',
          [('d', 'dist', 100, 'distance between the revisions')],
          "[INDEXFILE]")
 def perfrevlog(ui, repo, file_, **opts):
     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)
 
 @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 volative
     revisions set cache on the revset execution. Volatile cache hold filtered
     and obsolete related cache."""
     def d():
         if clear:
             repo.invalidatevolatilesets()
         repo.revs(expr)
     timer(d)
 
 @command('perfvolatilesets')
 def perfvolatilesets(ui, repo, *names):
     """benchmark the computation of various volatile set
 
     Volatile set computes element related to filtering and obsolescence."""
     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.filteredrevs(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)
+
+@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
+    """
+    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 = repoview.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
+
+
+