exarkun at intarweb.us
Fri Nov 7 04:26:07 CET 2003
On Fri, Nov 07, 2003 at 12:40:37AM +0000, James Harriman wrote:
> I need to be able to measure a time interval in milliseconds on a windows
> machine. I have tried using time.clock() but it appears to measure time in
> seconds...Is there a way to measure time more precisely?
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
Return the time as a floating point number expressed in seconds since
the epoch, in UTC. Note that even though the time is always returned as a
floating point number, not all systems provide time with a better precision
than 1 second. While this function normally returns non-decreasing values,
it can return a lower value than a previous call if the system clock has
been set back between the two calls.
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