Subj : Re: which for loop is better?
To   : comp.programming.threads
From : ssam_iit
Date : Fri Mar 25 2005 12:01 am

I should've elaborated the problem. Here it goes : for the same number
of total iterations(100*1000 in this example) in nested-for-loops, is
it more effective to have the outer for loop iterate more than the
inner one (case 2), or the other way around (case 1)?


David Hopwood <david.nospam.hopwood@blueyonder.co.uk> wrote in message news:<dfL0e.1131$IH3.327@fe3.news.blueyonder.co.uk>...
> sam wrote:
> > Hi, 
> >    which one of the following codes in C would you prefer to print
> > those "hello"s and why?
> > int i,j;
> > 1) for(i=0;i<=99;i++)
> >     for(j=0;j<=999;j++)
> >       printf("hello");
> > 
> > 2) for(i=0;i<=999;i++)
> >      for(j=0;j<=99;j++)
> >        printf("hello");
> 
> As if it matters. What a stupid question, teaching people to micro-optimize
> without thinking about whether it can possibly lead to any difference in
> perceptible performance. Whoever set this homework question should be
> ashamed of themselves.

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