Try storing a microtimestamp in an array between every statement, then echoing them out.
function getmicrotime(){
list($usec, $sec) = explode(" ",microtime());
return ((float)$usec + (float)$sec);
}
$time[]=getmicrotime();
$conn = ....
$time[]=getmicrotime();
$res1 = mysq_...
$time[]=getmicrotime();
$res2 = mysql...
$time[]=getmicrotime();
...
print implode("<BR>",$time);
and see what you get.