Mercurial > hg
view contrib/revsetbenchmarks.py @ 48587:3c8cc987672e
simplemerge: take over formatting of label from `filemerge`
The padding we do of conflict labels depends on which conflict marker
style is used. For two-way conflict markers (the default), the length
of the base label shouldn't matter. It does before this patch,
however. This patch moves the formatting from `filemerge` to
`simplemerge`. The latter knows which conflict marker style to use, so
it can easily decide about the padding.
This change will allow us to use more descriptive "base" labels
without causing illogical padding in 2-way markers. I'll do that next.
One wrinkle is that we pass the same labels to external merge tools. I
decided to change that in this patch to be simpler: no padding, and no
ellipsis to fit within 80 columns. My reasoning is that the typical
external, 3-or-4-panel merge tool doesn't show the labels on top of
each others, so the padding doesn't make sense there. The ellipsis is
probably not necessary because the external tools probably have their
own way of dealing with long labels. Also, we limit them to "80 - 8"
to fit the "<<<<<<< " before, which is almost definitely not what an
external tool would put there.
Differential Revision: https://phab.mercurial-scm.org/D12019
author | Martin von Zweigbergk <martinvonz@google.com> |
---|---|
date | Thu, 20 Jan 2022 11:06:52 -0800 |
parents | c102b704edb5 |
children | 6000f5b25c9b |
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#!/usr/bin/env python3 # Measure the performance of a list of revsets against multiple revisions # defined by parameter. Checkout one by one and run perfrevset with every # revset in the list to benchmark its performance. # # You should run this from the root of your mercurial repository. # # call with --help for details from __future__ import absolute_import, print_function import math import optparse # cannot use argparse, python 2.7 only import os import re import subprocess import sys DEFAULTVARIANTS = [ 'plain', 'min', 'max', 'first', 'last', 'reverse', 'reverse+first', 'reverse+last', 'sort', 'sort+first', 'sort+last', ] def check_output(*args, **kwargs): kwargs.setdefault('stderr', subprocess.PIPE) kwargs.setdefault('stdout', subprocess.PIPE) proc = subprocess.Popen(*args, **kwargs) output, error = proc.communicate() if proc.returncode != 0: raise subprocess.CalledProcessError(proc.returncode, ' '.join(args[0])) return output def update(rev): """update the repo to a revision""" try: subprocess.check_call(['hg', 'update', '--quiet', '--check', str(rev)]) check_output( ['make', 'local'], stderr=None ) # suppress output except for error/warning except subprocess.CalledProcessError as exc: print('update to revision %s failed, aborting' % rev, file=sys.stderr) sys.exit(exc.returncode) def hg(cmd, repo=None): """run a mercurial command <cmd> is the list of command + argument, <repo> is an optional repository path to run this command in.""" fullcmd = ['./hg'] if repo is not None: fullcmd += ['-R', repo] fullcmd += [ '--config', 'extensions.perf=' + os.path.join(contribdir, 'perf.py'), ] fullcmd += cmd return check_output(fullcmd, stderr=subprocess.STDOUT) def perf(revset, target=None, contexts=False): """run benchmark for this very revset""" try: args = ['perfrevset'] if contexts: args.append('--contexts') args.append('--') args.append(revset) output = hg(args, repo=target) return parseoutput(output) except subprocess.CalledProcessError as exc: print( 'abort: cannot run revset benchmark: %s' % exc.cmd, file=sys.stderr ) if getattr(exc, 'output', None) is None: # no output before 2.7 print('(no output)', file=sys.stderr) else: print(exc.output, file=sys.stderr) return None outputre = re.compile( br'! wall (\d+.\d+) comb (\d+.\d+) user (\d+.\d+) ' br'sys (\d+.\d+) \(best of (\d+)\)' ) def parseoutput(output): """parse a textual output into a dict We cannot just use json because we want to compare with old versions of Mercurial that may not support json output. """ match = outputre.search(output) if not match: print('abort: invalid output:', file=sys.stderr) print(output, file=sys.stderr) sys.exit(1) return { 'comb': float(match.group(2)), 'count': int(match.group(5)), 'sys': float(match.group(3)), 'user': float(match.group(4)), 'wall': float(match.group(1)), } def printrevision(rev): """print data about a revision""" sys.stdout.write("Revision ") sys.stdout.flush() subprocess.check_call( [ 'hg', 'log', '--rev', str(rev), '--template', '{if(tags, " ({tags})")} ' '{rev}:{node|short}: {desc|firstline}\n', ] ) def idxwidth(nbidx): """return the max width of number used for index This is similar to log10(nbidx), but we use custom code here because we start with zero and we'd rather not deal with all the extra rounding business that log10 would imply. """ nbidx -= 1 # starts at 0 idxwidth = 0 while nbidx: idxwidth += 1 nbidx //= 10 if not idxwidth: idxwidth = 1 return idxwidth def getfactor(main, other, field, sensitivity=0.05): """return the relative factor between values for 'field' in main and other Return None if the factor is insignificant (less than <sensitivity> variation).""" factor = 1 if main is not None: factor = other[field] / main[field] low, high = 1 - sensitivity, 1 + sensitivity if low < factor < high: return None return factor def formatfactor(factor): """format a factor into a 4 char string 22% 156% x2.4 x23 x789 x1e4 x5x7 """ if factor is None: return ' ' elif factor < 2: return '%3i%%' % (factor * 100) elif factor < 10: return 'x%3.1f' % factor elif factor < 1000: return '%4s' % ('x%i' % factor) else: order = int(math.log(factor)) + 1 while math.log(factor) > 1: factor //= 0 return 'x%ix%i' % (factor, order) def formattiming(value): """format a value to strictly 8 char, dropping some precision if needed""" if value < 10 ** 7: return ('%.6f' % value)[:8] else: # value is HUGE very unlikely to happen (4+ month run) return '%i' % value _marker = object() def printresult(variants, idx, data, maxidx, verbose=False, reference=_marker): """print a line of result to stdout""" mask = '%%0%ii) %%s' % idxwidth(maxidx) out = [] for var in variants: if data[var] is None: out.append('error ') out.append(' ' * 4) continue out.append(formattiming(data[var]['wall'])) if reference is not _marker: factor = None if reference is not None: factor = getfactor(reference[var], data[var], 'wall') out.append(formatfactor(factor)) if verbose: out.append(formattiming(data[var]['comb'])) out.append(formattiming(data[var]['user'])) out.append(formattiming(data[var]['sys'])) out.append('%6d' % data[var]['count']) print(mask % (idx, ' '.join(out))) def printheader(variants, maxidx, verbose=False, relative=False): header = [' ' * (idxwidth(maxidx) + 1)] for var in variants: if not var: var = 'iter' if len(var) > 8: var = var[:3] + '..' + var[-3:] header.append('%-8s' % var) if relative: header.append(' ') if verbose: header.append('%-8s' % 'comb') header.append('%-8s' % 'user') header.append('%-8s' % 'sys') header.append('%6s' % 'count') print(' '.join(header)) def getrevs(spec): """get the list of rev matched by a revset""" try: out = check_output(['hg', 'log', '--template={rev}\n', '--rev', spec]) except subprocess.CalledProcessError as exc: print("abort, can't get revision from %s" % spec, file=sys.stderr) sys.exit(exc.returncode) return [r for r in out.split() if r] def applyvariants(revset, variant): if variant == 'plain': return revset for var in variant.split('+'): revset = '%s(%s)' % (var, revset) return revset helptext = """This script will run multiple variants of provided revsets using different revisions in your mercurial repository. After the benchmark are run summary output is provided. Use it to demonstrate speed improvements or pin point regressions. Revsets to run are specified in a file (or from stdin), one revsets per line. Line starting with '#' will be ignored, allowing insertion of comments.""" parser = optparse.OptionParser( usage="usage: %prog [options] <revs>", description=helptext ) parser.add_option( "-f", "--file", help="read revset from FILE (stdin if omitted)", metavar="FILE", ) parser.add_option("-R", "--repo", help="run benchmark on REPO", metavar="REPO") parser.add_option( "-v", "--verbose", action='store_true', help="display all timing data (not just best total time)", ) parser.add_option( "", "--variants", default=','.join(DEFAULTVARIANTS), help="comma separated list of variant to test " "(eg: plain,min,sorted) (plain = no modification)", ) parser.add_option( '', '--contexts', action='store_true', help='obtain changectx from results instead of integer revs', ) (options, args) = parser.parse_args() if not args: parser.print_help() sys.exit(255) # the directory where both this script and the perf.py extension live. contribdir = os.path.dirname(__file__) revsetsfile = sys.stdin if options.file: revsetsfile = open(options.file) revsets = [l.strip() for l in revsetsfile if not l.startswith('#')] revsets = [l for l in revsets if l] print("Revsets to benchmark") print("----------------------------") for idx, rset in enumerate(revsets): print("%i) %s" % (idx, rset)) print("----------------------------") print() revs = [] for a in args: revs.extend(getrevs(a)) variants = options.variants.split(',') results = [] for r in revs: print("----------------------------") printrevision(r) print("----------------------------") update(r) res = [] results.append(res) printheader(variants, len(revsets), verbose=options.verbose) for idx, rset in enumerate(revsets): varres = {} for var in variants: varrset = applyvariants(rset, var) data = perf(varrset, target=options.repo, contexts=options.contexts) varres[var] = data res.append(varres) printresult( variants, idx, varres, len(revsets), verbose=options.verbose ) sys.stdout.flush() print("----------------------------") print( """ Result by revset ================ """ ) print('Revision:') for idx, rev in enumerate(revs): sys.stdout.write('%i) ' % idx) sys.stdout.flush() printrevision(rev) print() print() for ridx, rset in enumerate(revsets): print("revset #%i: %s" % (ridx, rset)) printheader(variants, len(results), verbose=options.verbose, relative=True) ref = None for idx, data in enumerate(results): printresult( variants, idx, data[ridx], len(results), verbose=options.verbose, reference=ref, ) ref = data[ridx] print()