Mercurial > hg
annotate contrib/hgperf @ 25018:93e015a3d1ea
commit: add ui.allowemptycommit config option
This adds a config flag that enables a user to make empty commits.
This is useful in a number of cases.
For instance, automation that creates release branches via
bookmarks may want to make empty commits to that release bookmark so that it
can't be fast-forwarded and so it can record information about the release
bookmark's creation. This is already possible with named branches, so making it
possible for bookmarks makes sense.
Another case we've wanted it is for mirroring repositories into Mercurial. We
have automation that syncs commits into hg by running things from the command
line. The ability to produce empty commits is useful for syncing unusual commits
from other VCS's.
In general, allowing the user to create the DAG as they see fit seems useful,
and when I mentioned this in IRC more than one person piped up and said they
were already hacking around this limitation by using mq, import, and
commit-dummy-change-then-amend-the-content-away style solutions.
author | Durham Goode <durham@fb.com> |
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date | Mon, 11 May 2015 16:18:28 -0700 |
parents | 377a111d1cd2 |
children | 22fbca1d11ed |
rev | line source |
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1 #!/usr/bin/env python |
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2 # |
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3 # hgperf - measure performance of Mercurial commands |
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4 # |
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5 # Copyright 2014 Matt Mackall <mpm@selenic.com> |
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6 # |
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7 # This software may be used and distributed according to the terms of the |
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8 # GNU General Public License version 2 or any later version. |
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9 |
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10 '''measure performance of Mercurial commands |
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11 |
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12 Using ``hgperf`` instead of ``hg`` measures performance of the target |
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13 Mercurial command. For example, the execution below measures |
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14 performance of :hg:`heads --topo`:: |
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15 |
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16 $ hgperf heads --topo |
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17 |
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18 All command output via ``ui`` is suppressed, and just measurement |
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19 result is displayed: see also "perf" extension in "contrib". |
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20 |
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21 Costs of processing before dispatching to the command function like |
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22 below are not measured:: |
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23 |
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24 - parsing command line (e.g. option validity check) |
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25 - reading configuration files in |
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26 |
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27 But ``pre-`` and ``post-`` hook invocation for the target command is |
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28 measured, even though these are invoked before or after dispatching to |
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29 the command function, because these may be required to repeat |
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30 execution of the target command correctly. |
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31 ''' |
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32 |
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33 import os |
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34 import sys |
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35 |
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36 libdir = '@LIBDIR@' |
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37 |
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38 if libdir != '@' 'LIBDIR' '@': |
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39 if not os.path.isabs(libdir): |
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40 libdir = os.path.join(os.path.dirname(os.path.realpath(__file__)), |
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41 libdir) |
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42 libdir = os.path.abspath(libdir) |
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43 sys.path.insert(0, libdir) |
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44 |
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45 # enable importing on demand to reduce startup time |
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46 try: |
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47 from mercurial import demandimport; demandimport.enable() |
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48 except ImportError: |
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49 import sys |
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50 sys.stderr.write("abort: couldn't find mercurial libraries in [%s]\n" % |
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51 ' '.join(sys.path)) |
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52 sys.stderr.write("(check your install and PYTHONPATH)\n") |
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53 sys.exit(-1) |
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54 |
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55 import mercurial.util |
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56 import mercurial.dispatch |
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57 |
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58 import time |
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59 |
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60 def timer(func, title=None): |
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61 results = [] |
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62 begin = time.time() |
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63 count = 0 |
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64 while True: |
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65 ostart = os.times() |
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66 cstart = time.time() |
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67 r = func() |
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68 cstop = time.time() |
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69 ostop = os.times() |
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70 count += 1 |
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71 a, b = ostart, ostop |
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72 results.append((cstop - cstart, b[0] - a[0], b[1]-a[1])) |
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73 if cstop - begin > 3 and count >= 100: |
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74 break |
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75 if cstop - begin > 10 and count >= 3: |
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76 break |
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77 if title: |
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78 sys.stderr.write("! %s\n" % title) |
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79 if r: |
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80 sys.stderr.write("! result: %s\n" % r) |
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81 m = min(results) |
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82 sys.stderr.write("! wall %f comb %f user %f sys %f (best of %d)\n" |
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83 % (m[0], m[1] + m[2], m[1], m[2], count)) |
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84 |
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85 orgruncommand = mercurial.dispatch.runcommand |
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86 |
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87 def runcommand(lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions): |
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88 ui.pushbuffer() |
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89 lui.pushbuffer() |
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90 timer(lambda : orgruncommand(lui, repo, cmd, fullargs, ui, |
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91 options, d, cmdpats, cmdoptions)) |
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92 ui.popbuffer() |
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93 lui.popbuffer() |
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94 |
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95 mercurial.dispatch.runcommand = runcommand |
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96 |
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97 for fp in (sys.stdin, sys.stdout, sys.stderr): |
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98 mercurial.util.setbinary(fp) |
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99 |
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100 mercurial.dispatch.run() |