How to measure elapsed time under Windows?
jeanmichel at sequans.com
Tue Feb 9 19:23:21 CET 2010
Grant Edwards wrote:
> What's the correct way to measure small periods of elapsed
> time. I've always used time.clock() in the past:
> start = time.clock()
> [stuff being timed]
> stop = time.clock()
> delta = stop-start
> However on multi-processor machines that doesn't work.
> Sometimes I get negative values for delta. According to
> google, this is due to a bug in Windows that causes the value
> of time.clock() to be different depending on which core in a
> multi-core CPU you happen to be on. [insert appropriate
> MS-bashing here]
> Is there another way to measure small periods of elapsed time
> (say in the 1-10ms range)?
> Is there a way to lock the python process to a single core so
> that time.clock() works right?
Did you try with the datetime module ?
t0 = datetime.datetime.now()
t1 = t0 - datetime.datetime.now()
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