view mercurial/lsprof.py @ 5331:8ee5b8129e7b

hgweb: don't raise an exception when displying empty repos The nullid node claims it's in the default branch, but the branch dict is empty. This fixes the main symptom from issue696, but we may want to set branchtags()['default'] = nullid somewhere for empty repos.
author Alexis S. L. Carvalho <alexis@cecm.usp.br>
date Mon, 24 Sep 2007 19:00:11 -0300
parents 976b6b2a1613
children
line wrap: on
line source

# this is copied from the lsprof distro because somehow
# it is not installed by distutils
#
# small modifications made

import sys
try:
    from _lsprof import Profiler, profiler_entry, profiler_subentry
except ImportError, inst:
    import packagescan
    if packagescan.scan_in_progress:
        raise packagescan.SkipPackage('_lsprof not available')
    raise

__all__ = ['profile', 'Stats']

def profile(f, *args, **kwds):
    """XXX docstring"""
    p = Profiler()
    p.enable(subcalls=True)
    try:
        ret = f(*args, **kwds)
    finally:
        p.disable()
    return ret, Stats(p.getstats())


class Stats(object):
    """XXX docstring"""

    def __init__(self, data):
        self.data = data

    def sort(self, crit="inlinetime"):
        """XXX docstring"""
        if crit not in profiler_entry.__dict__:
            raise ValueError, "Can't sort by %s" % crit
        self.data.sort(lambda b, a: cmp(getattr(a, crit),
                                        getattr(b, crit)))
        for e in self.data:
            if e.calls:
                e.calls.sort(lambda b, a: cmp(getattr(a, crit),
                                              getattr(b, crit)))

    def pprint(self, top=None, file=None, limit=None, climit=None):
        """XXX docstring"""
        if file is None:
            file = sys.stdout
        d = self.data
        if top is not None:
            d = d[:top]
        cols = "% 12s %11.4f %11.4f   %s\n"
        hcols = "% 12s %12s %12s %s\n"
        cols2 = "+%12s %11.4f %11.4f +  %s\n"
        file.write(hcols % ("CallCount", "Total(s)",
                            "Inline(s)", "module:lineno(function)"))
        count = 0
        for e in d:
            file.write(cols % (e.callcount, e.totaltime,
                               e.inlinetime, label(e.code)))
            count += 1
            if limit is not None and count == limit:
                return
            ccount = 0
            if e.calls:
                for se in e.calls:
                    file.write(cols % ("+%s" % se.callcount,
                                       se.totaltime, se.inlinetime,
                                       "+%s" % label(se.code)))
                    count += 1
                    ccount += 1
                    if limit is not None and count == limit:
                        return
                    if climit is not None and ccount == climit:
                        break

    def freeze(self):
        """Replace all references to code objects with string
        descriptions; this makes it possible to pickle the instance."""

        # this code is probably rather ickier than it needs to be!
        for i in range(len(self.data)):
            e = self.data[i]
            if not isinstance(e.code, str):
                self.data[i] = type(e)((label(e.code),) + e[1:])
                if e.calls:
                    for j in range(len(e.calls)):
                        se = e.calls[j]
                        if not isinstance(se.code, str):
                            e.calls[j] = type(se)((label(se.code),) + se[1:])

_fn2mod = {}

def label(code):
    if isinstance(code, str):
        return code
    try:
        mname = _fn2mod[code.co_filename]
    except KeyError:
        for k, v in sys.modules.iteritems():
            if v is None:
                continue
            if not hasattr(v, '__file__'):
                continue
            if not isinstance(v.__file__, str):
                continue
            if v.__file__.startswith(code.co_filename):
                mname = _fn2mod[code.co_filename] = k
                break
        else:
            mname = _fn2mod[code.co_filename] = '<%s>'%code.co_filename

    return '%s:%d(%s)' % (mname, code.co_firstlineno, code.co_name)


if __name__ == '__main__':
    import os
    sys.argv = sys.argv[1:]
    if not sys.argv:
        print >> sys.stderr, "usage: lsprof.py <script> <arguments...>"
        sys.exit(2)
    sys.path.insert(0, os.path.abspath(os.path.dirname(sys.argv[0])))
    stats = profile(execfile, sys.argv[0], globals(), locals())
    stats.sort()
    stats.pprint()