time.perf_counter in Python 2?

Florian Lindner mailinglists at xgm.de
Mon Oct 20 09:47:42 CEST 2014


Hello,

I wrote a script that does some time measurements. It uses 
time.perf_counter() from Python 3 which works very well. Now I need to 
backport it to python 2.

Docs say that time.clock() is way to go:

time.clock()
On Unix, return the current processor time as a floating point number 
expressed in seconds. The precision, and in fact the very definition of the 
meaning of “processor time”, depends on that of the C function of the same 
name, but in any case, this is the function to use for benchmarking Python 
or timing algorithms.

On Windows, this function returns wall-clock seconds elapsed since the first 
call to this function, as a floating point number, based on the Win32 
function QueryPerformanceCounter(). The resolution is typically better than 
one microsecond.

But for me it always returns the almost same number, nothing time like:

Python 2.7.3 (default, Feb 27 2014, 19:58:35) 
[GCC 4.6.3] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import time
>>> time.clock()
0.03
>>> time.clock()
0.03
>>> time.clock()
0.04
>>> time.clock()
0.04


What's wrong there?

Thanks,
Florian




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