revsetbenchmarks: drop outdated comment

We are no longer testing against system mercurial for quite some time.

contrib/revsetbenchmarks.py

@@ -1,213 +1,210
 #!/usr/bin/env python
 
 # 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
-#
-# This script also does one run of the current version of mercurial installed
-# to compare performance.
 
 import sys
 import os
 import re
 from subprocess import check_call, Popen, CalledProcessError, STDOUT, PIPE
 # cannot use argparse, python 2.7 only
 from optparse import OptionParser
 
 def check_output(*args, **kwargs):
     kwargs.setdefault('stderr', PIPE)
     kwargs.setdefault('stdout', PIPE)
     proc = Popen(*args, **kwargs)
     output, error = proc.communicate()
     if proc.returncode != 0:
         raise CalledProcessError(proc.returncode, ' '.join(args[0]))
     return output
 
 def update(rev):
     """update the repo to a revision"""
     try:
         check_call(['hg', 'update', '--quiet', '--check', str(rev)])
     except CalledProcessError, exc:
         print >> sys.stderr, 'update to revision %s failed, aborting' % rev
         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=STDOUT)
 
 def perf(revset, target=None):
     """run benchmark for this very revset"""
     try:
         output = hg(['perfrevset', revset], repo=target)
         return parseoutput(output)
     except CalledProcessError, exc:
         print >> sys.stderr, 'abort: cannot run revset benchmark: %s' % exc.cmd
         if exc.output is None:
             print >> sys.stderr, '(no ouput)'
         else:
             print >> sys.stderr, exc.output
         sys.exit(exc.returncode)
 
 outputre = re.compile(r'! wall (\d+.\d+) comb (\d+.\d+) user (\d+.\d+) '
                       '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 >> sys.stderr, 'abort: invalid output:'
         print >> sys.stderr, output
         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()
     check_call(['hg', 'log', '--rev', str(rev), '--template',
                '{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 printresult(idx, data, maxidx):
     """print a line of result to stdout"""
     mask = '%%0%ii) %%s' % idxwidth(maxidx)
     out = ['%10.6f' % data['wall'],
            '%10.6f' % data['comb'],
            '%10.6f' % data['user'],
            '%10.6f' % data['sys'],
            '%6d'    % data['count'],
           ]
     print mask % (idx, ' '.join(out))
 
 def printheader(maxidx):
     header = [' ' * (idxwidth(maxidx) + 1),
               '  %-8s' % 'wall',
               '  %-8s' % 'comb',
               '  %-8s' % 'user',
               '  %-8s' % 'sys',
               '%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 CalledProcessError, exc:
         print >> sys.stderr, "abort, can't get revision from %s" % spec
         sys.exit(exc.returncode)
     return [r for r in out.split() if r]
 
 
 parser = OptionParser(usage="usage: %prog [options] <revs>")
 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")
 
 (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('#')]
 
 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))
 
 results = []
 for r in revs:
     print "----------------------------"
     printrevision(r)
     print "----------------------------"
     update(r)
     res = []
     results.append(res)
     printheader(len(revsets))
     for idx, rset in enumerate(revsets):
         data = perf(rset, target=options.repo)
         res.append(data)
         printresult(idx, data, len(revsets))
         sys.stdout.flush()
     print "----------------------------"
 
 
 print """
 
 Result by revset
 ================
 """
 
 print 'Revision:', revs
 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(len(results))
     for idx, data in enumerate(results):
         printresult(idx, data[ridx], len(results))
     print