Use a monotonic clock to compute timeouts

Lib/trace.py

 #!/usr/bin/env python3
 
 # portions copyright 2001, Autonomous Zones Industries, Inc., all rights...
 # err...  reserved and offered to the public under the terms of the
 # Python 2.2 license.
 # Author: Zooko O'Whielacronx
 # http://zooko.com/
 # mailto:zooko@zooko.com
 #
 # Copyright 2000, Mojam Media, Inc., all rights reserved.
@@ skipping 41 matching lines @@
 import os
 import re
 import sys
 import token
 import tokenize
 import inspect
 import gc
 import dis
 import pickle
 from warnings import warn as _warn
-try:
-    from time import monotonic as _time
-except ImportError:
-    from time import time as _time
+from time import monotonic as _time
 
 try:
     import threading
 except ImportError:
     _settrace = sys.settrace
 
     def _unsettrace():
         sys.settrace(None)
 else:
     def _settrace(func):
@@ skipping 774 matching lines @@
          DeprecationWarning, 2)
     return _find_strings(filename, encoding=None)
 
 def find_executable_linenos(filename):
     _warn("The trace.find_executable_linenos() function is deprecated",
          DeprecationWarning, 2)
     return _find_executable_linenos(filename)
 
 if __name__=='__main__':
     main()