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line_profiler.py
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line_profiler.py
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#!/usr/bin/env python
# -*- coding: utf-8 -*-
# This file is a hacked version of line_profiler.py from the kernprof package
# https://github.com/rkern/line_profiler
# It has all IPython hardcoded dependencies removed in order to make it
# usable inside Blender.
# Modification 2016 12 23 1415 by Michel J. Anders (varkenvarken)
# Article on how to use it:
# http://blog.michelanders.nl/2016/12/profiling-using-kernprof-in-blender-addons.html
#This software is OSI Certified Open Source Software.
#OSI Certified is a certification mark of the Open Source Initiative.
#Copyright (c) 2008, Enthought, Inc.
#All rights reserved.
#Redistribution and use in source and binary forms, with or without
#modification, are permitted provided that the following conditions are met:
#* Redistributions of source code must retain the above copyright notice, this
# list of conditions and the following disclaimer.
#* Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions and the following disclaimer in the documentation
# and/or other materials provided with the distribution.
#* Neither the name of Enthought, Inc. nor the names of its contributors may
# be used to endorse or promote products derived from this software without
# specific prior written permission.
#THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
#ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
#WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
#DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
#ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
#(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
#LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
#ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
#(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
#SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
from __future__ import print_function
try:
import cPickle as pickle
except ImportError:
import pickle
try:
from cStringIO import StringIO
except ImportError:
from io import StringIO
import functools
import inspect
import linecache
import optparse
import os
import sys
from _line_profiler import LineProfiler as CLineProfiler
# Python 2/3 compatibility utils
# ===========================================================
PY3 = sys.version_info[0] == 3
# exec (from https://bitbucket.org/gutworth/six/):
if PY3:
import builtins
exec_ = getattr(builtins, "exec")
del builtins
else:
def exec_(_code_, _globs_=None, _locs_=None):
"""Execute code in a namespace."""
if _globs_ is None:
frame = sys._getframe(1)
_globs_ = frame.f_globals
if _locs_ is None:
_locs_ = frame.f_locals
del frame
elif _locs_ is None:
_locs_ = _globs_
exec("""exec _code_ in _globs_, _locs_""")
# ============================================================
CO_GENERATOR = 0x0020
def is_generator(f):
""" Return True if a function is a generator.
"""
isgen = (f.__code__.co_flags & CO_GENERATOR) != 0
return isgen
class LineProfiler(CLineProfiler):
""" A profiler that records the execution times of individual lines.
"""
def __call__(self, func):
""" Decorate a function to start the profiler on function entry and stop
it on function exit.
"""
self.add_function(func)
if is_generator(func):
wrapper = self.wrap_generator(func)
else:
wrapper = self.wrap_function(func)
return wrapper
def wrap_generator(self, func):
""" Wrap a generator to profile it.
"""
@functools.wraps(func)
def wrapper(*args, **kwds):
g = func(*args, **kwds)
# The first iterate will not be a .send()
self.enable_by_count()
try:
item = next(g)
finally:
self.disable_by_count()
input = (yield item)
# But any following one might be.
while True:
self.enable_by_count()
try:
item = g.send(input)
finally:
self.disable_by_count()
input = (yield item)
return wrapper
def wrap_function(self, func):
""" Wrap a function to profile it.
"""
@functools.wraps(func)
def wrapper(*args, **kwds):
self.enable_by_count()
try:
result = func(*args, **kwds)
finally:
self.disable_by_count()
return result
return wrapper
def dump_stats(self, filename):
""" Dump a representation of the data to a file as a pickled LineStats
object from `get_stats()`.
"""
lstats = self.get_stats()
with open(filename, 'wb') as f:
pickle.dump(lstats, f, pickle.HIGHEST_PROTOCOL)
def print_stats(self, stream=None, stripzeros=False):
""" Show the gathered statistics.
"""
lstats = self.get_stats()
show_text(lstats.timings, lstats.unit, stream=stream, stripzeros=stripzeros)
def run(self, cmd):
""" Profile a single executable statment in the main namespace.
"""
import __main__
main_dict = __main__.__dict__
return self.runctx(cmd, main_dict, main_dict)
def runctx(self, cmd, globals, locals):
""" Profile a single executable statement in the given namespaces.
"""
self.enable_by_count()
try:
exec_(cmd, globals, locals)
finally:
self.disable_by_count()
return self
def runcall(self, func, *args, **kw):
""" Profile a single function call.
"""
self.enable_by_count()
try:
return func(*args, **kw)
finally:
self.disable_by_count()
def add_module(self, mod):
""" Add all the functions in a module and its classes.
"""
from inspect import isclass, isfunction
nfuncsadded = 0
for item in mod.__dict__.values():
if isclass(item):
for k, v in item.__dict__.items():
if isfunction(v):
self.add_function(v)
nfuncsadded += 1
elif isfunction(item):
self.add_function(item)
nfuncsadded += 1
return nfuncsadded
def show_func(filename, start_lineno, func_name, timings, unit, stream=None, stripzeros=False):
""" Show results for a single function.
"""
if stream is None:
stream = sys.stdout
template = '%6s %9s %12s %8s %8s %-s'
d = {}
total_time = 0.0
linenos = []
for lineno, nhits, time in timings:
total_time += time
linenos.append(lineno)
if stripzeros and total_time == 0:
return
stream.write("Total time: %g s\n" % (total_time * unit))
if os.path.exists(filename) or filename.startswith("<ipython-input-"):
stream.write("File: %s\n" % filename)
stream.write("Function: %s at line %s\n" % (func_name, start_lineno))
if os.path.exists(filename):
# Clear the cache to ensure that we get up-to-date results.
linecache.clearcache()
all_lines = linecache.getlines(filename)
sublines = inspect.getblock(all_lines[start_lineno-1:])
else:
stream.write("\n")
stream.write("Could not find file %s\n" % filename)
stream.write("Are you sure you are running this program from the same directory\n")
stream.write("that you ran the profiler from?\n")
stream.write("Continuing without the function's contents.\n")
# Fake empty lines so we can see the timings, if not the code.
nlines = max(linenos) - min(min(linenos), start_lineno) + 1
sublines = [''] * nlines
for lineno, nhits, time in timings:
d[lineno] = (nhits, time, '%5.1f' % (float(time) / nhits),
'%5.1f' % (100*time / total_time))
linenos = range(start_lineno, start_lineno + len(sublines))
empty = ('', '', '', '')
header = template % ('Line #', 'Hits', 'Time', 'Per Hit', '% Time',
'Line Contents')
stream.write("\n")
stream.write(header)
stream.write("\n")
stream.write('=' * len(header))
stream.write("\n")
for lineno, line in zip(linenos, sublines):
nhits, time, per_hit, percent = d.get(lineno, empty)
txt = template % (lineno, nhits, time, per_hit, percent,
line.rstrip('\n').rstrip('\r'))
stream.write(txt)
stream.write("\n")
stream.write("\n")
def show_text(stats, unit, stream=None, stripzeros=False):
""" Show text for the given timings.
"""
if stream is None:
stream = sys.stdout
stream.write('Timer unit: %g s\n\n' % unit)
for (fn, lineno, name), timings in sorted(stats.items()):
show_func(fn, lineno, name, stats[fn, lineno, name], unit, stream=stream, stripzeros=stripzeros)
def load_stats(filename):
""" Utility function to load a pickled LineStats object from a given
filename.
"""
with open(filename, 'rb') as f:
return pickle.load(f)
def main():
usage = "usage: %prog profile.lprof"
parser = optparse.OptionParser(usage=usage, version='%prog 1.0b2')
options, args = parser.parse_args()
if len(args) != 1:
parser.error("Must provide a filename.")
lstats = load_stats(args[0])
show_text(lstats.timings, lstats.unit)
if __name__ == '__main__':
main()