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# -*- coding: utf-8 -*-
#
# Profiler support
#
# Copyright 2012-2019 Michael Buesch <m@bues.ch>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
#from cms.cython_support cimport * #@cy
from cms.exception import *
from io import StringIO
__all__ = [
"Profiler",
]
class Profiler(object):
__slots__ = (
"__profileModule",
"__pstatsModule",
"__profiler",
"__enableCount",
)
def __init__(self):
try:
import cProfile as profileModule
except ImportError:
profileModule = None
self.__profileModule = profileModule
try:
import pstats as pstatsModule
except ImportError:
pstatsModule = None
self.__pstatsModule = pstatsModule
if not self.__profileModule or\
not self.__pstatsModule:
raise CMSException(404, "Failed to load cProfile/pstats modules. "
"Cannot enable profiling.")
self.__profiler = self.__profileModule.Profile()
self.__enableCount = 0
def start(self):
if self.__enableCount <= 0:
self.__profiler.enable()
self.__enableCount += 1
def stop(self):
self.__enableCount = max(self.__enableCount - 1, 0)
if self.__enableCount <= 0:
self.__profiler.disable()
def getResult(self):
sio = StringIO()
ps = self.__pstatsModule.Stats(self.__profiler,
stream=sio)
ps.sort_stats("time")
ps.print_stats()
return sio.getvalue()
|
