Mercurial > hg
view mercurial/hook.py @ 43198:c16fe77e340a
pathcopies: give up any optimization based on `introrev`
Between 8a0136f69027 and d98fb3f42f33, we sped up the search for the
introduction revision during path copies. However, further checking show that
finding the introduction revision is still expensive and that we are better off
without it. So we simply drop it and only rely on the linkrev optimisation.
I ran `perfpathcopies` on 6989 pair of revision in the pypy
repository (`hg perfhelper-pathcopies`. The result is massively in favor of
dropping this condition. The result of the copy tracing are unchanged.
Attempt to use a smaller changes preserving linkrev usage were unsuccessful, it
can return wrong result. The following changesets broke test-mv-cp-st-diff.t
- if not f.isintroducedafter(limit):
+ if limit >= 0 and f.linkrev() < limit:
return None
Here are various numbers (before this changeset/after this changesets)
source destination before after saved-time ratio
worth cases e66f24650daf 695dfb0f493b 1.062843 1.246369 -0.183526 1.172675
c979853a3b6a 8d60fe293e79 1.036985 1.196414 -0.159429 1.153743
22349fa2fc33 fbb1c9fd86c0 0.879926 1.038682 -0.158756 1.180420
682b98f3e672 a4878080a536 0.909952 1.063801 -0.153849 1.169074
5adabc9b9848 920958a93997 0.993622 1.147452 -0.153830 1.154817
worse 1% dbfbfcf077e9 aea8f2fd3593 1.016595 1.082999 -0.066404 1.065320
worse 5% c95f1ced15f2 7d29d5e39734 0.453694 0.471156 -0.017462 1.038488
worse 10% 3e144ed1d5b7 2aef0e942480 0.035140 0.037535 -0.002395 1.068156
worse 25% 321fc60db035 801748ba582a 0.009267 0.009325 -0.000058 1.006259
median 2088ce763fc2 e6991321d78b 0.000665 0.000651 0.000014 0.978947
best 25% 915631a97de6 385b31354be6 0.040743 0.040363 0.000380 0.990673
best 10% ad495c36a765 19c10384d3e7 0.431658 0.411490 0.020168 0.953278
best 5% d13ae7d283ae 813c99f810ac 1.141404 1.075346 0.066058 0.942126
best 1% 81593cb4a496 99ae11866969 1.833297 0.063823 1.769474 0.034813
best cases c3b14617fbd7 743a0fcaa4eb 1101.811740 2.735970 1099.075770 0.002483
c3b14617fbd7 9ba6ab77fd29 1116.753953 2.800729 1113.953224 0.002508
058b99d6e81f 57e249b7a3ea 1246.128485 3.042762 1243.085723 0.002442
9a8c361aab49 0354a250d371 1253.111894 3.085796 1250.026098 0.002463
442dbbc53c68 3ec1002a818c 1261.786294 3.138607 1258.647687 0.002487
As one can see, the average case is not really impacted. However, the worth case
we get after this changeset are much better than the one we had before it. We
have 30 pairs where improvements are above 10 minutes.
This reflect in the combined time for all pairs
before: 26256s
after: 1300s (-95%)
If we remove these pathological 30 cases, we still see a significant improvements:
before: 1631s
after: 1245s (-24%)
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
---|---|
date | Thu, 10 Oct 2019 03:49:33 +0200 |
parents | 8ff1ecfadcd1 |
children | 313e3a279828 |
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# hook.py - hook support for mercurial # # Copyright 2007 Matt Mackall <mpm@selenic.com> # # This software may be used and distributed according to the terms of the # GNU General Public License version 2 or any later version. from __future__ import absolute_import import os import sys from .i18n import _ from .pycompat import getattr from . import ( demandimport, encoding, error, extensions, pycompat, util, ) from .utils import ( procutil, stringutil, ) def pythonhook(ui, repo, htype, hname, funcname, args, throw): '''call python hook. hook is callable object, looked up as name in python module. if callable returns "true", hook fails, else passes. if hook raises exception, treated as hook failure. exception propagates if throw is "true". reason for "true" meaning "hook failed" is so that unmodified commands (e.g. mercurial.commands.update) can be run as hooks without wrappers to convert return values.''' if callable(funcname): obj = funcname funcname = pycompat.sysbytes(obj.__module__ + r"." + obj.__name__) else: d = funcname.rfind(b'.') if d == -1: raise error.HookLoadError( _(b'%s hook is invalid: "%s" not in a module') % (hname, funcname) ) modname = funcname[:d] oldpaths = sys.path if procutil.mainfrozen(): # binary installs require sys.path manipulation modpath, modfile = os.path.split(modname) if modpath and modfile: sys.path = sys.path[:] + [modpath] modname = modfile with demandimport.deactivated(): try: obj = __import__(pycompat.sysstr(modname)) except (ImportError, SyntaxError): e1 = sys.exc_info() try: # extensions are loaded with hgext_ prefix obj = __import__(r"hgext_%s" % pycompat.sysstr(modname)) except (ImportError, SyntaxError): e2 = sys.exc_info() if ui.tracebackflag: ui.warn( _( b'exception from first failed import ' b'attempt:\n' ) ) ui.traceback(e1) if ui.tracebackflag: ui.warn( _( b'exception from second failed import ' b'attempt:\n' ) ) ui.traceback(e2) if not ui.tracebackflag: tracebackhint = _( b'run with --traceback for stack trace' ) else: tracebackhint = None raise error.HookLoadError( _(b'%s hook is invalid: import of "%s" failed') % (hname, modname), hint=tracebackhint, ) sys.path = oldpaths try: for p in funcname.split(b'.')[1:]: obj = getattr(obj, p) except AttributeError: raise error.HookLoadError( _(b'%s hook is invalid: "%s" is not defined') % (hname, funcname) ) if not callable(obj): raise error.HookLoadError( _(b'%s hook is invalid: "%s" is not callable') % (hname, funcname) ) ui.note(_(b"calling hook %s: %s\n") % (hname, funcname)) starttime = util.timer() try: r = obj(ui=ui, repo=repo, hooktype=htype, **pycompat.strkwargs(args)) except Exception as exc: if isinstance(exc, error.Abort): ui.warn(_(b'error: %s hook failed: %s\n') % (hname, exc.args[0])) else: ui.warn( _(b'error: %s hook raised an exception: %s\n') % (hname, stringutil.forcebytestr(exc)) ) if throw: raise if not ui.tracebackflag: ui.warn(_(b'(run with --traceback for stack trace)\n')) ui.traceback() return True, True finally: duration = util.timer() - starttime ui.log( b'pythonhook', b'pythonhook-%s: %s finished in %0.2f seconds\n', htype, funcname, duration, ) if r: if throw: raise error.HookAbort(_(b'%s hook failed') % hname) ui.warn(_(b'warning: %s hook failed\n') % hname) return r, False def _exthook(ui, repo, htype, name, cmd, args, throw): starttime = util.timer() env = {} # make in-memory changes visible to external process if repo is not None: tr = repo.currenttransaction() repo.dirstate.write(tr) if tr and tr.writepending(): env[b'HG_PENDING'] = repo.root env[b'HG_HOOKTYPE'] = htype env[b'HG_HOOKNAME'] = name for k, v in pycompat.iteritems(args): if callable(v): v = v() if isinstance(v, (dict, list)): v = stringutil.pprint(v) env[b'HG_' + k.upper()] = v if ui.configbool(b'hooks', b'tonative.%s' % name, False): oldcmd = cmd cmd = procutil.shelltonative(cmd, env) if cmd != oldcmd: ui.note(_(b'converting hook "%s" to native\n') % name) ui.note(_(b"running hook %s: %s\n") % (name, cmd)) if repo: cwd = repo.root else: cwd = encoding.getcwd() r = ui.system(cmd, environ=env, cwd=cwd, blockedtag=b'exthook-%s' % (name,)) duration = util.timer() - starttime ui.log( b'exthook', b'exthook-%s: %s finished in %0.2f seconds\n', name, cmd, duration, ) if r: desc = procutil.explainexit(r) if throw: raise error.HookAbort(_(b'%s hook %s') % (name, desc)) ui.warn(_(b'warning: %s hook %s\n') % (name, desc)) return r # represent an untrusted hook command _fromuntrusted = object() def _allhooks(ui): """return a list of (hook-id, cmd) pairs sorted by priority""" hooks = _hookitems(ui) # Be careful in this section, propagating the real commands from untrusted # sources would create a security vulnerability, make sure anything altered # in that section uses "_fromuntrusted" as its command. untrustedhooks = _hookitems(ui, _untrusted=True) for name, value in untrustedhooks.items(): trustedvalue = hooks.get(name, (None, None, name, _fromuntrusted)) if value != trustedvalue: (lp, lo, lk, lv) = trustedvalue hooks[name] = (lp, lo, lk, _fromuntrusted) # (end of the security sensitive section) return [(k, v) for p, o, k, v in sorted(hooks.values())] def _hookitems(ui, _untrusted=False): """return all hooks items ready to be sorted""" hooks = {} for name, cmd in ui.configitems(b'hooks', untrusted=_untrusted): if name.startswith(b'priority.') or name.startswith(b'tonative.'): continue priority = ui.configint(b'hooks', b'priority.%s' % name, 0) hooks[name] = (-priority, len(hooks), name, cmd) return hooks _redirect = False def redirect(state): global _redirect _redirect = state def hashook(ui, htype): """return True if a hook is configured for 'htype'""" if not ui.callhooks: return False for hname, cmd in _allhooks(ui): if hname.split(b'.')[0] == htype and cmd: return True return False def hook(ui, repo, htype, throw=False, **args): if not ui.callhooks: return False hooks = [] for hname, cmd in _allhooks(ui): if hname.split(b'.')[0] == htype and cmd: hooks.append((hname, cmd)) res = runhooks(ui, repo, htype, hooks, throw=throw, **args) r = False for hname, cmd in hooks: r = res[hname][0] or r return r def runhooks(ui, repo, htype, hooks, throw=False, **args): args = pycompat.byteskwargs(args) res = {} oldstdout = -1 try: for hname, cmd in hooks: if oldstdout == -1 and _redirect: try: stdoutno = procutil.stdout.fileno() stderrno = procutil.stderr.fileno() # temporarily redirect stdout to stderr, if possible if stdoutno >= 0 and stderrno >= 0: procutil.stdout.flush() oldstdout = os.dup(stdoutno) os.dup2(stderrno, stdoutno) except (OSError, AttributeError): # files seem to be bogus, give up on redirecting (WSGI, etc) pass if cmd is _fromuntrusted: if throw: raise error.HookAbort( _(b'untrusted hook %s not executed') % hname, hint=_(b"see 'hg help config.trusted'"), ) ui.warn(_(b'warning: untrusted hook %s not executed\n') % hname) r = 1 raised = False elif callable(cmd): r, raised = pythonhook(ui, repo, htype, hname, cmd, args, throw) elif cmd.startswith(b'python:'): if cmd.count(b':') >= 2: path, cmd = cmd[7:].rsplit(b':', 1) path = util.expandpath(path) if repo: path = os.path.join(repo.root, path) try: mod = extensions.loadpath(path, b'hghook.%s' % hname) except Exception: ui.write(_(b"loading %s hook failed:\n") % hname) raise hookfn = getattr(mod, cmd) else: hookfn = cmd[7:].strip() r, raised = pythonhook( ui, repo, htype, hname, hookfn, args, throw ) else: r = _exthook(ui, repo, htype, hname, cmd, args, throw) raised = False res[hname] = r, raised finally: # The stderr is fully buffered on Windows when connected to a pipe. # A forcible flush is required to make small stderr data in the # remote side available to the client immediately. procutil.stderr.flush() if _redirect and oldstdout >= 0: procutil.stdout.flush() # write hook output to stderr fd os.dup2(oldstdout, stdoutno) os.close(oldstdout) return res