High-resolution timers

[Michael Hudson]

Bryan <bryan at eevolved.com> writes:

> I understand that the precision of the timer is
> hardware-dependent... But can someone give me an example of a
> platform on which time.time() has a resolution of less than 1
> millisecond ?

Windows:

>>> d = {}
>>> for i in range(100000):
	d[time.time()] = 1

	
>>> len(d)
51
>>> l = d.keys()
>>> l.sort()
>>> for i in range(len(l) - 1):
        print l[i+1] - l[i],

0.0110000371933 0.00999999046326 0.00999999046326 0.00999999046326
0.00999999046326 0.00999999046326 0.00999999046326 0.00999999046326
0.00999999046326 0.0100001096725 0.00999999046326 0.00999999046326
0.00999999046326 0.00999999046326 0.00999999046326 0.00999999046326
0.00999999046326 0.00999999046326 0.00999999046326 0.00999999046326
0.00999999046326 0.0100001096725 0.00999999046326 0.00999999046326
0.00999999046326 0.00999999046326 0.00999999046326 0.00999999046326
0.00999999046326 0.00999999046326 0.00999999046326 0.00999999046326
0.00999999046326 0.00999999046326 0.0100001096725 0.00999999046326
0.00999999046326 0.00999999046326 0.00999999046326 0.00999999046326
0.00999999046326 0.00999999046326 0.00999999046326 0.00999999046326
0.00999999046326 0.00999999046326 0.0100001096725 0.00999999046326
0.00999999046326 0.00999999046326

Looks like a resolution of 0.01 to me.

Linux, OTOH:

>>> d = {}
>>> import time
>>> for i in range(1000):
...  d[time.time()] = 1
...
>>> len(d)
1000

Cheers,
M.

-- 
  ARTHUR:  Ford, you're turning into a penguin, stop it.
                    -- The Hitch-Hikers Guide to the Galaxy, Episode 2