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import sys
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from _lsprof import Profiler, profiler_entry
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__all__ = ['profile', 'Stats']
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def profile(f, *args, **kwds):
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"""XXX docstring"""
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p = Profiler()
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p.enable(subcalls=True, builtins=True)
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try:
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f(*args, **kwds)
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finally:
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p.disable()
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return Stats(p.getstats())
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class Stats(object):
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"""XXX docstring"""
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def __init__(self, data):
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self.data = data
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def sort(self, crit="inlinetime"):
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"""XXX docstring"""
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if crit not in profiler_entry.__dict__:
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raise ValueError("Can't sort by %s" % crit)
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self.data.sort(key=lambda x: getattr(x, crit), reverse=True)
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for e in self.data:
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if e.calls:
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e.calls.sort(key=lambda x: getattr(x, crit), reverse=True)
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def pprint(self, top=None, file=None, limit=None, climit=None):
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"""XXX docstring"""
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if file is None:
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file = sys.stdout
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d = self.data
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if top is not None:
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d = d[:top]
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cols = "% 12s %12s %11.4f %11.4f %s\n"
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hcols = "% 12s %12s %12s %12s %s\n"
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file.write(hcols % ("CallCount", "Recursive", "Total(ms)",
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"Inline(ms)", "module:lineno(function)"))
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count = 0
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for e in d:
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file.write(cols % (e.callcount, e.reccallcount, e.totaltime,
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e.inlinetime, label(e.code)))
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count += 1
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if limit is not None and count == limit:
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return
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ccount = 0
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if e.calls:
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for se in e.calls:
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file.write(cols % ("+%s" % se.callcount, se.reccallcount,
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se.totaltime, se.inlinetime,
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"+%s" % label(se.code)))
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count += 1
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ccount += 1
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if limit is not None and count == limit:
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return
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if climit is not None and ccount == climit:
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break
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def freeze(self):
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"""Replace all references to code objects with string
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descriptions; this makes it possible to pickle the instance."""
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# this code is probably rather ickier than it needs to be!
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for i in range(len(self.data)):
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e = self.data[i]
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if not isinstance(e.code, str):
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self.data[i] = type(e)((label(e.code),) + e[1:])
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if e.calls:
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for j in range(len(e.calls)):
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se = e.calls[j]
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if not isinstance(se.code, str):
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e.calls[j] = type(se)((label(se.code),) + se[1:])
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_fn2mod = {}
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def label(code):
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if isinstance(code, str):
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return code
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try:
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mname = _fn2mod[code.co_filename]
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except KeyError:
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for k, v in list(sys.modules.iteritems()):
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if v is None:
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continue
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if not hasattr(v, '__file__'):
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continue
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if not isinstance(v.__file__, str):
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continue
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if v.__file__.startswith(code.co_filename):
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mname = _fn2mod[code.co_filename] = k
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break
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else:
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mname = _fn2mod[code.co_filename] = '<%s>' % code.co_filename
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return '%s:%d(%s)' % (mname, code.co_firstlineno, code.co_name)
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if __name__ == '__main__':
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import os
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sys.argv = sys.argv[1:]
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if not sys.argv:
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print >> sys.stderr, "usage: lsprof.py <script> <arguments...>"
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sys.exit(2)
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sys.path.insert(0, os.path.abspath(os.path.dirname(sys.argv[0])))
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stats = profile(execfile, sys.argv[0], globals(), locals())
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stats.sort()
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stats.pprint()
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