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# Copyright (c) 2013 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
import logging
import time
class TimeProfile(object):
"""Class for simple profiling of action, with logging of cost."""
def __init__(self, description='operation'):
self._starttime = None
self._endtime = None
self._description = description
self.Start()
def Start(self):
self._starttime = time.time()
self._endtime = None
def GetDelta(self):
"""Returns the rounded delta.
Also stops the timer if Stop() has not already been called.
"""
if self._endtime is None:
self.Stop(log=False)
delta = self._endtime - self._starttime
delta = round(delta, 2) if delta < 10 else round(delta, 1)
return delta
def LogResult(self):
"""Logs the result."""
logging.info('%s seconds to perform %s', self.GetDelta(), self._description)
def Stop(self, log=True):
"""Stop profiling.
Args:
log: Log the delta (defaults to true).
"""
self._endtime = time.time()
if log:
self.LogResult()
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