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Re:Let's make the web faster: PHP performance tips by Google by eropple on Friday June 03, 2011 @02:41AM (#2615398)
Agreed. Said other bits in another comment, but:

-mysql_query()? BAD GOOGLE WEBMASTER, NO COOKIE FOR YOU. Seriously - there is no good reason not to use PDO, or at least MDB2. (Doctrine is better, but it's just a superset of PDO.)

-References are a modern PHP programmer's (quiet you, stop laughing!) best friend. "Don't use shortened variables because you'll copy data! Just reuse the $_POST['barf']!" Never mind that $foo = &$_POST['barf'] achieves both goals...

Re:Let's make the web faster: PHP performance tips by Google by smalyshev on Friday June 03, 2011 @04:39AM (#2615590)
$foo = $_POST['barf'] does not copy data.