build/android/pylib/utils/time_profile.py

   1 # Copyright (c) 2013 The Chromium Authors. All rights reserved.
   2 # Use of this source code is governed by a BSD-style license that can be
   3 # found in the LICENSE file.
   4
   5 import logging
   6 import time
   7
   8
   9 class TimeProfile(object):
  10   """Class for simple profiling of action, with logging of cost."""
  11
  12   def __init__(self, description):
  13     self._starttime = None
  14     self._description = description
  15     self.Start()
  16
  17   def Start(self):
  18     self._starttime = time.time()
  19
  20   def Stop(self):
  21     """Stop profiling and dump a log."""
  22     if self._starttime:
  23       stoptime = time.time()
  24       logging.info('%fsec to perform %s',
  25                    stoptime - self._starttime, self._description)
  26       self._starttime = None