Mercurial > hg
annotate mercurial/lsprof.py @ 26755:bb0b955d050d
streamclone: support for producing and consuming stream clone bundles
Up to this point, stream clones only existed as a dynamically generated
data format produced and consumed during streaming clones. In order to
support this efficient cloning format with the clone bundles feature, we
need a more formal, on disk representation of the streaming clone data.
This patch introduces a new "bundle" type for streaming clones. Unlike
existing bundles, it does not contain changegroup data. It does,
however, share the same concepts like the 4 byte header which identifies
the type of data that follows and the 2 byte abbreviation for
compression types (of which only "UN" is currently supported).
The new bundle format is essentially the existing stream clone version 1
data format with some headers at the beginning.
Content negotiation at stream clone request time checked for repository
format/requirements compatibility before initiating a stream clone. We
can't do active content negotiation when using clone bundles. So, we put
this set of requirements inside the payload so consumers have a built-in
mechanism for checking compatibility before reading and applying lots of
data. Of course, we will also advertise this requirements set in clone
bundles. But that's for another patch.
We currently don't have a mechanism to produce and consume this new
bundle format. This will be implemented in upcoming patches.
It's worth noting that if a legacy client attempts to `hg unbundle` a
stream clone bundle (with the "HGS1" header), it will abort with:
"unknown bundle version S1," which seems appropriate.
author | Gregory Szorc <gregory.szorc@gmail.com> |
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date | Sat, 17 Oct 2015 11:14:52 -0700 |
parents | a40d608e2a7b |
children | 9c75daf89450 |
rev | line source |
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1 import sys |
6212 | 2 from _lsprof import Profiler, profiler_entry |
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3 |
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4 __all__ = ['profile', 'Stats'] |
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5 |
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6 def profile(f, *args, **kwds): |
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7 """XXX docstring""" |
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8 p = Profiler() |
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9 p.enable(subcalls=True, builtins=True) |
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10 try: |
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11 f(*args, **kwds) |
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12 finally: |
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13 p.disable() |
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14 return Stats(p.getstats()) |
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15 |
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16 |
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17 class Stats(object): |
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18 """XXX docstring""" |
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19 |
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20 def __init__(self, data): |
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21 self.data = data |
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22 |
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23 def sort(self, crit="inlinetime"): |
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24 """XXX docstring""" |
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25 if crit not in profiler_entry.__dict__: |
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26 raise ValueError("Can't sort by %s" % crit) |
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27 self.data.sort(key=lambda x: getattr(x, crit), reverse=True) |
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28 for e in self.data: |
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29 if e.calls: |
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30 e.calls.sort(key=lambda x: getattr(x, crit), reverse=True) |
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31 |
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32 def pprint(self, top=None, file=None, limit=None, climit=None): |
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33 """XXX docstring""" |
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34 if file is None: |
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35 file = sys.stdout |
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36 d = self.data |
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37 if top is not None: |
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38 d = d[:top] |
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39 cols = "% 12s %12s %11.4f %11.4f %s\n" |
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40 hcols = "% 12s %12s %12s %12s %s\n" |
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41 file.write(hcols % ("CallCount", "Recursive", "Total(s)", |
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42 "Inline(s)", "module:lineno(function)")) |
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43 count = 0 |
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44 for e in d: |
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45 file.write(cols % (e.callcount, e.reccallcount, e.totaltime, |
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46 e.inlinetime, label(e.code))) |
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47 count += 1 |
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48 if limit is not None and count == limit: |
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49 return |
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50 ccount = 0 |
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51 if climit and e.calls: |
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52 for se in e.calls: |
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53 file.write(cols % (se.callcount, se.reccallcount, |
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54 se.totaltime, se.inlinetime, |
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55 " %s" % label(se.code))) |
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56 count += 1 |
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57 ccount += 1 |
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58 if limit is not None and count == limit: |
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59 return |
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60 if climit is not None and ccount == climit: |
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61 break |
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62 |
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63 def freeze(self): |
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64 """Replace all references to code objects with string |
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65 descriptions; this makes it possible to pickle the instance.""" |
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66 |
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67 # this code is probably rather ickier than it needs to be! |
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68 for i in range(len(self.data)): |
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69 e = self.data[i] |
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70 if not isinstance(e.code, str): |
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71 self.data[i] = type(e)((label(e.code),) + e[1:]) |
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72 if e.calls: |
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73 for j in range(len(e.calls)): |
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74 se = e.calls[j] |
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75 if not isinstance(se.code, str): |
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76 e.calls[j] = type(se)((label(se.code),) + se[1:]) |
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77 |
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78 _fn2mod = {} |
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79 |
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80 def label(code): |
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81 if isinstance(code, str): |
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82 return code |
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83 try: |
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84 mname = _fn2mod[code.co_filename] |
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85 except KeyError: |
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86 for k, v in list(sys.modules.iteritems()): |
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87 if v is None: |
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88 continue |
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89 if not isinstance(getattr(v, '__file__', None), str): |
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90 continue |
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91 if v.__file__.startswith(code.co_filename): |
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92 mname = _fn2mod[code.co_filename] = k |
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93 break |
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94 else: |
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95 mname = _fn2mod[code.co_filename] = '<%s>' % code.co_filename |
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96 |
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97 return '%s:%d(%s)' % (mname, code.co_firstlineno, code.co_name) |
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98 |
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99 |
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100 if __name__ == '__main__': |
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101 import os |
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102 sys.argv = sys.argv[1:] |
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103 if not sys.argv: |
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add --lsprof option. 3x faster than --profile, more useful output.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff
changeset
|
104 print >> sys.stderr, "usage: lsprof.py <script> <arguments...>" |
6aa75e77cafe
add --lsprof option. 3x faster than --profile, more useful output.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff
changeset
|
105 sys.exit(2) |
6aa75e77cafe
add --lsprof option. 3x faster than --profile, more useful output.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff
changeset
|
106 sys.path.insert(0, os.path.abspath(os.path.dirname(sys.argv[0]))) |
6aa75e77cafe
add --lsprof option. 3x faster than --profile, more useful output.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff
changeset
|
107 stats = profile(execfile, sys.argv[0], globals(), locals()) |
6aa75e77cafe
add --lsprof option. 3x faster than --profile, more useful output.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff
changeset
|
108 stats.sort() |
6aa75e77cafe
add --lsprof option. 3x faster than --profile, more useful output.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff
changeset
|
109 stats.pprint() |