STINNER Victor <victor.stin...@gmail.com> added the comment:

time.monotonic() has 3 implementations:

* Windows: QueryPerformanceCounter() with QueryPerformanceFrequency()
* Mac OS X: mach_absolute_time() with mach_timebase_info()
* UNIX: clock_gettime(CLOCK_MONOTONIC_RAW) or clock_gettime(CLOCK_MONOTONIC)

QueryPerformanceFrequency() returns the frequency "in counts per second" 
according to the doc.
http://msdn.microsoft.com/en-us/library/windows/desktop/ms644905(v=vs.85).aspx

mach_absolute_time() with mach_timebase_info() returns a number of seconds, but 
Python uses *1e-9.

clock_gettime() uses a timespec structure and Python uses *1e-9.

It looks like to mention that time.monotonic() unit is seconds.

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nosy: +haypo

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<http://bugs.python.org/issue14277>
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