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$string .= $new vs $string = $string . $new performance
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$string .= $new vs $string = $string . $new performance Leigh Finch 07-03-2008
Posted by Leigh Finch on July 3, 2008, 6:41 pm
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 Hey Guys,
Quick question about the PHP compiler, is there any performance
difference between

$string .= $new;

and

$string = $string . $new;

Does the compiler see them as equivalent and optimize to the later, or
does concatenate and then copy?

Can anyone point me to some documentation on this, I havent been able to
find anything on this particular topic?

Cheers
Leigh Finch

Posted by Michael Fesser on July 3, 2008, 6:48 pm
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 .oO(Leigh Finch)

>Quick question about the PHP compiler, is there any performance
>difference between
>
>$string .= $new;
>
>and
>
>$string = $string . $new;
>
>Does the compiler see them as equivalent and optimize to the later, or
>does concatenate and then copy?

Don't worry and google "premature optimization" if you want to.

Micha

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