Mercurial > hg
annotate contrib/hgperf @ 31740:a40e979b9d97
largefiles: use readasstandin() to read hex hash directly from filectx
BTW, C implementation of hexdigest() for SHA-1/256/512 returns hex
hash in lower case, and doctest in Python standard hashlib assumes
that, too. But it isn't explicitly described in API document or so.
Therefore, we can't assume that hexdigest() always returns hex hash in
lower case, for any hash algorithms, on any Python runtimes and
versions.
From point of view of that, it is reasonable for portability that
40800668e019 applies lower() on hex hash in overridefilemerge().
But on the other hand, in largefiles extension, there are still many
code paths comparing between hex hashes or storing hex hash into
standin file, without lower().
Switching to hash algorithm other than SHA-1 may be good chance to
clarify our policy about hexdigest()-ed hash value string.
- assume that hexdigest() always returns hex hash in lower case, or
- apply lower() on hex hash in appropriate layers to ensure
lower-case-ness of it for portability
author | FUJIWARA Katsunori <foozy@lares.dti.ne.jp> |
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date | Sat, 01 Apr 2017 02:32:49 +0900 |
parents | 22fbca1d11ed |
children | 78f644fdaa2a |
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 def timer(func, title=None): |
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59 results = [] |
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60 begin = mercurial.util.timer() |
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61 count = 0 |
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62 while True: |
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63 ostart = os.times() |
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64 cstart = mercurial.util.timer() |
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65 r = func() |
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66 cstop = mercurial.util.timer() |
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67 ostop = os.times() |
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68 count += 1 |
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69 a, b = ostart, ostop |
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70 results.append((cstop - cstart, b[0] - a[0], b[1]-a[1])) |
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71 if cstop - begin > 3 and count >= 100: |
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72 break |
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73 if cstop - begin > 10 and count >= 3: |
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74 break |
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75 if title: |
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76 sys.stderr.write("! %s\n" % title) |
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77 if r: |
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78 sys.stderr.write("! result: %s\n" % r) |
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79 m = min(results) |
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80 sys.stderr.write("! wall %f comb %f user %f sys %f (best of %d)\n" |
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81 % (m[0], m[1] + m[2], m[1], m[2], count)) |
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82 |
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83 orgruncommand = mercurial.dispatch.runcommand |
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84 |
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85 def runcommand(lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions): |
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86 ui.pushbuffer() |
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87 lui.pushbuffer() |
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88 timer(lambda : orgruncommand(lui, repo, cmd, fullargs, ui, |
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89 options, d, cmdpats, cmdoptions)) |
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90 ui.popbuffer() |
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91 lui.popbuffer() |
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92 |
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93 mercurial.dispatch.runcommand = runcommand |
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94 |
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95 for fp in (sys.stdin, sys.stdout, sys.stderr): |
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96 mercurial.util.setbinary(fp) |
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97 |
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98 mercurial.dispatch.run() |