Posted by Thomas Mlynarczyk on 10/18/06 18:45

Also sprach Sonnich:

> So, which is faster:
>
> for($j = 0;$j<count($array);$j++)
> or
>
> $j = 0
> while($j<count($array))
> $j++;

I don't think they make much difference. If the "direction" doesn't matter,
the following is much (!) faster as count($array) is calculated only once
and there's one expression less to evaluate:

for ( $i = count( $array ); $i--; )
{
// do useful stuff
}

OTOH, if the "useful stuff" takes a lot of time, the performance gain might
turn out to be negligible in comparison.

> Which is faster:
>
> if .... else ...
> or:
> if (true) ...
> if (false) ...

I think, "if...else" should be slightly faster as only one condition needs
to be evaluated.

Greetings,
Thomas

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