Mercurial > hg
view contrib/perf.py @ 27142:060f83d219b9
extensions: refuse to load extensions if minimum hg version not met
As the author of several 3rd party extensions, I frequently see bug
reports from users attempting to run my extension with an old version
of Mercurial that I no longer support in my extension. Oftentimes, the
extension will import just fine. But as soon as we run extsetup(),
reposetup(), or get into the guts of a wrapped function, we encounter
an exception and abort. Today, Mercurial will print a message about
extensions that don't have a "testedwith" declaring explicit
compatibility with the current version.
The existing mechanism is a good start. But it isn't as robust as I
would like. Specifically, Mercurial assumes compatibility by default.
This means extension authors must perform compatibility checking in
their extsetup() or we wait and see if we encounter an abort at
runtime. And, compatibility checking can involve a lot of code and
lots of error checking. It's a lot of effort for extension authors.
Oftentimes, extension authors know which versions of Mercurial there
extension works on and more importantly where it is broken.
This patch introduces a magic "minimumhgversion" attribute in
extensions. When found, the extension loading mechanism will compare
the declared version against the current Mercurial version. If the
extension explicitly states we require a newer Mercurial version, a
warning is printed and the extension isn't loaded beyond importing
the Python module. This causes a graceful failure while alerting
the user of the compatibility issue.
I would be receptive to the idea of making the failure more fatal.
However, care would need to be taken to not criple every hg command.
e.g. the user may use `hg config` to fix the hgrc and if we aborted
trying to run that, the user would effectively be locked out of `hg`!
A potential future improvement to this functionality would be to catch
ImportError for the extension/module and parse the source code for
"minimumhgversion = 'XXX'" and do similar checking. This way we could
give more information about why the extension failed to load.
author | Gregory Szorc <gregory.szorc@gmail.com> |
---|---|
date | Tue, 24 Nov 2015 15:16:25 -0800 |
parents | 8d5dba93aa4f |
children | 528cf1a73ae5 |
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# 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, error import time, os, sys import functools formatteropts = commands.formatteropts 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.""" # 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) 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', 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, 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._mancache.clear() repo.manifest._cache = None 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(): os.system("HGRCPATH= %s version -q > /dev/null" % cmd) timer(d) fm.end() @command('perfparents', formatteropts) def perfparents(ui, repo, **opts): timer, fm = gettimer(ui, opts) if len(repo.changelog) < 1000: raise error.Abort("repo needs 1000 commits for this test") repo = repo.unfiltered() 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('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, **opts): timer, fm = gettimer(ui, opts) ui.pushbuffer() timer(lambda: commands.log(ui, repo, 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, **opts): timer, fm = gettimer(ui, opts) 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', 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() 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', [('d', 'dist', 100, 'distance between the revisions')] + formatteropts, "[INDEXFILE]") def perfrevlog(ui, repo, file_, **opts): timer, fm = gettimer(ui, 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) 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()