develooper Front page | perl.perl5.porters | Postings from January 2001

Re: 2% speedup with Duff's device

Thread Previous | Thread Next
Nick Ing-Simmons
January 23, 2001 09:09
Re: 2% speedup with Duff's device
Message ID:
Nicholas Clark <> writes:
>real    2m16.388s
>user    1m3.610s
>sys     0m11.000s
>(which is from time ./perl TEST)
>I was under the impression that real is wallclock, and the other two
>are user and system call CPU time, not elapsed time.

Of course. And the wall clock time is known useless.
But if you get consistent user/sys times running the same perl
on the same suite then you are lucky.

I seem to get at least ±5% without changing ANYTHING apart from typing 
at the prompt. 

Nick Ing-Simmons <>
Via, but not speaking for: Texas Instruments Ltd.

Thread Previous | Thread Next Perl Programming lists via nntp and http.
Comments to Ask Bjørn Hansen at | Group listing | About