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To: David Grudl <david@grudl.com>
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Date: Sun, 14 Dec 2008 15:21:47 -0500
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Subject: Re: [PHP-DEV] Ternary operator optimization tip
From: ilia@prohost.org (Ilia Alshanetsky)

While it is slower due to the use of temp vars, in my experience  
unless you have a few hundred operations involving ternary operator  
you cannot even see the difference. Even then there are typically way  
more important areas of code that need to be optimized. The only time  
you can really tell its slower is in synthetic benchmarks.


On 14-Dec-08, at 12:06 PM, David Grudl wrote:

> Hello,
>
> ternary operator is very nice syntactic sugar...
>
>   $foo = $cond ? $bar : $baz;
>
> ...but it may slows down scripts. When $bar is array or relative big  
> string, it is better to aviod sugar and use if:
>
>   if ($cond) $foo = $bar; else $foo = $baz;
>
> and reference counting will be used.
>
> I don't know how difficult it is to implement, but it can be very  
> useful speed optimization for PHP 5.3 to improve ternary operator to  
> use reference counting.
>
> David Grudl
>
>
>
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Ilia Alshanetsky