[Numpy-discussion] extracting a random subset of a vector

Robert Kern rkern at ucsd.edu
Tue Sep 7 16:38:16 CDT 2004


[Replying to the list instead of just Jp. Sorry, Jp! Mail readers will 
be the death of me.]

Jp Calderone wrote:

> Chris Barker wrote:
> 
>> Curzio Basso wrote:
>>
>>> a question about the method: isn't a bit risky to use the clock() for 
>>> timing the performance? The usual argument is that CPU allocates time 
>>> for different processes, and the allocation could vary. 
>>
>>
>>
>> that's why I use time.clock() rather than time.time().
>>
> 
>   Perhaps clearing up a mutually divergent assumption:  time.clock() 
> measures CPU time on POSIX and wallclock time (with higher precision 
> than time.time()) on Win32.

FWIW, the idiom recommended by Tim Peters is the following:

import time
import sys

if sys.platform == 'win32':
     now = time.clock
else:
     now = time.time

and then using now() to get the current time.

>   Jp

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter




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