Re: extracting a random subset of a vector

Chris Barker wrote:

> > and from the hotshot output is looks like it's the indexing, not the 
> > permutation, which takes time.
>
> not from my tests:

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 
used the profiler.

Anyway, I performed another test with the profiler, on the example you 
also used, and I also obtained that most of the time is spent in 
permutation() (2.264 over 2.273 secs).

regards


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