Re: The "goto" discussion on the Internals List

On Tue, 2005-06-07 at 14:26, John Nichel wrote: > Jay Blanchard wrote: > <snip> > > The speed difference is negligible though, in this day and age, > > dependent upon how much hair-splitting you would care to do. You're > > still setting aside a block of code which will have to be parsed and you > > incur the same setup if the goto section is the same code as the > > function. The overhead is introduced in the calling of the function. But > > we're splitting hairs here :) > </snip> > > Ah, but goto isn't really the same as a function. Functions are along > the lines of gosub. > > *not to be left out on the splitting of hairs ;) A more realistic speed hit is the fact that using if/elseif/else or switch statements requires on average an O( n ) lookup, whereas a proper goto implemention is O( 1 ). Now I'll give you you could do an label to function map and use that instead, but that's still O( lg n ). Cheers, Rob. -- .------------------------------------------------------------. | InterJinn Application Framework - http://www.interjinn.com | :------------------------------------------------------------: | An application and templating framework for PHP. Boasting | | a powerful, scalable system for accessing system services | | such as forms, properties, sessions, and caches. InterJinn | | also provides an extremely flexible architecture for | | creating re-usable components quickly and easily. | `------------------------------------------------------------'