Ah, right, that would be it. Here are the numbers for 100 concurrent processes with fork (the thread measurement above was done with 100 threads).

                               Xeon         AMD64
single process, empty loop     500,000/s    220,000/s
two processes, empty loop      340,000/s    185,000/s
single process, gettimeofday   235,000/s    85,000/s
two processes, gettimeofday    190,000/s    80,000/s

[download]

Still better than threads for the SMP system, not as good for the single-processor one. Which is as expected, so nothing to see here ;-).


Debugging is twice as hard as writing the code in the first place. Therefore, if you write the code as cleverly as possible, you are, by definition, not smart enough to debug it. -- Brian W. Kernighan

In reply to Re^10: OT How fast a cpu to overwhelm Time::HiRes by tirwhan
in thread OT How fast a cpu to overwhelm Time::HiRes by zentara

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