PHWinfo - Afficher un message

15/01/2008, 04h44

On Jan 14, 6:18 pm, cplusplusquest...@gmail.com wrote:
> # time ./a.out test.data
>
> the output:
>
> real 0m49.172s
> user 0m5.638s
> sys 0m4.850s
>
> Why real time and user time have big difference? I've tried to change
> a code: for example disable print() function, the real time and user
> time closer. How to improve the real time in a program?

http://www.google.com/search?hl=en&q...=Google+Search

The first result would probably be a good place to start.

I wouldn't do anything without a profiler though.

15/01/2008, 04h44	#3
jonnyothan@gmail.com Messages: n/a Hébergeur:	Re: Program Running Time On Jan 14, 6:18 pm, cplusplusquest...@gmail.com wrote: > # time ./a.out test.data > > the output: > > real 0m49.172s > user 0m5.638s > sys 0m4.850s > > Why real time and user time have big difference? I've tried to change > a code: for example disable print() function, the real time and user > time closer. How to improve the real time in a program? http://www.google.com/search?hl=en&q...=Google+Search The first result would probably be a good place to start. I wouldn't do anything without a profiler though.