mercurial/lsprof.py
author Brendan Cully <brendan@kublai.com>
Mon, 12 Mar 2007 13:58:06 -0700
changeset 4201 7e95381a9f1e
parent 2497 976b6b2a1613
child 5992 30c40ba10963
permissions -rw-r--r--
Strip [PATCH...] from message subject when importing patches
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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# this is copied from the lsprof distro because somehow
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# it is not installed by distutils
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#
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# small modifications made
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import sys
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try:
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    from _lsprof import Profiler, profiler_entry, profiler_subentry
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except ImportError, inst:
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    import packagescan
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    if packagescan.scan_in_progress:
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        raise packagescan.SkipPackage('_lsprof not available')
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    raise
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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)
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    try:
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        ret = f(*args, **kwds)
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    finally:
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        p.disable()
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    return ret, 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(lambda b, a: cmp(getattr(a, crit),
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                                        getattr(b, crit)))
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        for e in self.data:
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            if e.calls:
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                e.calls.sort(lambda b, a: cmp(getattr(a, crit),
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                                              getattr(b, crit)))
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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 %11.4f %11.4f   %s\n"
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        hcols = "% 12s %12s %12s %s\n"
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        cols2 = "+%12s %11.4f %11.4f +  %s\n"
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        file.write(hcols % ("CallCount", "Total(s)",
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                            "Inline(s)", "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.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,
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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 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()