It would depend on the machine language and I doubt it would in practice make a noticeable difference... but typically when you perform integer arithmetic (as in decrementing a counter) there are CPU flags set indicating whether the result is less than, equal to or greater than zero. Therefore you won't need to perform a separate comparison if you are testing against zero.
Rod On Friday 16 June 2006 09:28, Peter Jay Salzman wrote: > I've read somewhere that a loop that runs from 0 to some number should be > written to go in reverse order, e.g. instead of: > > for ( int i = 0; i < 10; ++i ) > > we should write: > > for ( int i = 9; i >= 0; --i ) > > The rationale is that it's faster to test against 0 than some other integer, > but it isn't obvious to me *why* it's faster. > > Why is that? > > Pete _______________________________________________ vox-tech mailing list [email protected] http://lists.lugod.org/mailman/listinfo/vox-tech
