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

Re: 2% speedup with Duff's device

Thread Previous | Thread Next
From:
Nick Ing-Simmons
Date:
January 23, 2001 09:09
Subject:
Re: 2% speedup with Duff's device
Message ID:
200101231708.RAA14073@mikado.tiuk.ti.com
Nicholas Clark <nick@ccl4.org> 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 
!!<cr>
at the prompt. 


-- 
Nick Ing-Simmons <nik@tiuk.ti.com>
Via, but not speaking for: Texas Instruments Ltd.


Thread Previous | Thread Next


nntp.perl.org: Perl Programming lists via nntp and http.
Comments to Ask Bjørn Hansen at ask@perl.org | Group listing | About