tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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time_profile.py (1115B)

      1 # Copyright 2013 The Chromium Authors
      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:
     10  """Class for simple profiling of action, with logging of cost."""
     11 
     12  def __init__(self, description='operation'):
     13    self._starttime = None
     14    self._endtime = None
     15    self._description = description
     16    self.Start()
     17 
     18  def Start(self):
     19    self._starttime = time.time()
     20    self._endtime = None
     21 
     22  def GetDelta(self):
     23    """Returns the rounded delta.
     24 
     25    Also stops the timer if Stop() has not already been called.
     26    """
     27    if self._endtime is None:
     28      self.Stop(log=False)
     29    delta = self._endtime - self._starttime
     30    delta = round(delta, 2) if delta < 10 else round(delta, 1)
     31    return delta
     32 
     33  def LogResult(self):
     34    """Logs the result."""
     35    logging.info('%s seconds to perform %s', self.GetDelta(), self._description)
     36 
     37  def Stop(self, log=True):
     38    """Stop profiling.
     39 
     40    Args:
     41      log: Log the delta (defaults to true).
     42    """
     43    self._endtime = time.time()
     44    if log:
     45      self.LogResult()