question on timing results
Globe Trotter
itsme_410 at yahoo.com
Wed Jun 8 14:26:48 UTC 2005
--- Matthew Miller <mattdm at mattdm.org> wrote:
> On Wed, Jun 08, 2005 at 06:40:34AM -0700, Globe Trotter wrote:
> > utilization. Unless I misunderstood the documentation, clock() provides
> > the processor time and so the difference between clock() at the beginning
> > of the call to an algorithm and the end would provide me with the CPU time
> > elapsed. However, if for some reason the processor was running at 75% or
> > whatever, my reported time would be affected, and hence there would not
> > really be a fair comparison. Does anyone have any ideas/suggestions as to
> > how I may settle this issue?
>
> clock() returns an approximation of the CPU time used by the actual process,
> so while load from other programs is a factor (particularly since it'll make
> your program wait for IO, etc.) it should do basically what you want.
>
Oh, really! This really does help: thanks!
Best wishes!
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