mercurial/lsprof.py
author Gregory Szorc <gregory.szorc@gmail.com>
Wed, 21 Oct 2020 22:53:15 -0700
branchstable
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permissions -rw-r--r--
automation: upload Python 3.9 Windows wheels We are producing these. We should be publishing them.
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from __future__ import absolute_import, print_function
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import _lsprof
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import sys
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from .pycompat import getattr
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from . import pycompat
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Profiler = _lsprof.Profiler
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# PyPy doesn't expose profiler_entry from the module.
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profiler_entry = getattr(_lsprof, 'profiler_entry', None)
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__all__ = [b'profile', b'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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        # profiler_entries isn't defined when running under PyPy.
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        if profiler_entry:
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            if crit not in profiler_entry.__dict__:
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                raise ValueError(b"Can't sort by %s" % crit)
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        elif self.data and not getattr(self.data[0], crit, None):
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            raise ValueError(b"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 = b"% 12d %12d %11.4f %11.4f   %s\n"
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        hcols = b"% 12s %12s %12s %12s %s\n"
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        file.write(
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            hcols
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            % (
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                b"CallCount",
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                b"Recursive",
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                b"Total(s)",
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                b"Inline(s)",
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                b"module:lineno(function)",
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            )
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        )
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        count = 0
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        for e in d:
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            file.write(
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                cols
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                % (
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                    e.callcount,
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                    e.reccallcount,
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                    e.totaltime,
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                    e.inlinetime,
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                    label(e.code),
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                )
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            )
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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 climit and e.calls:
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                for se in e.calls:
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                    file.write(
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                        cols
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                        % (
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                            se.callcount,
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                            se.reccallcount,
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                            se.totaltime,
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                            se.inlinetime,
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                            b"    %s" % label(se.code),
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                        )
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                    )
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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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        if sys.version_info.major >= 3:
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            code = code.encode('latin-1')
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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(pycompat.iteritems(sys.modules)):
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            if v is None:
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                continue
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            if not isinstance(getattr(v, '__file__', None), 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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    res = '%s:%d(%s)' % (mname, code.co_firstlineno, code.co_name)
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    if sys.version_info.major >= 3:
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        res = res.encode('latin-1')
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    return res