note 72143 added to function.implode

Note that PHP uses copy-on-write so passing parameters (even array parameters) by reference gains you no performance benefit, and in fact in some cases can HURT performance. For example: php > $array = array('a','s','d','f'); php > $start = microtime(true); for($i=0; $i<1000000; $i++) byref($array); echo microtime(true)-$start; 2.40807890892 php > $start = microtime(true); for($i=0; $i<1000000; $i++) byval($array); echo microtime(true)-$start; 1.40822386742 ---- Server IP: 66.163.161.117 Probable Submitter: 75.19.79.5 ---- Manual Page -- http://www.php.net/manual/en/function.implode.php Edit -- https://master.php.net/note/edit/72143 Del: integrated -- https://master.php.net/note/delete/72143/integrated Del: useless -- https://master.php.net/note/delete/72143/useless Del: bad code -- https://master.php.net/note/delete/72143/bad+code Del: spam -- https://master.php.net/note/delete/72143/spam Del: non-english -- https://master.php.net/note/delete/72143/non-english Del: in docs -- https://master.php.net/note/delete/72143/in+docs Del: other reasons-- https://master.php.net/note/delete/72143 Reject -- https://master.php.net/note/reject/72143 Search -- https://master.php.net/manage/user-notes.php