On Apr 17, 2008, at 5:37 AM, Nathan Nobbe wrote:
all,
i have heard from various sources that using the & in php can at
times be
costly, and therefore, it should not be used when it is not
needed. for
example, passing an array by reference because you think youre
passing the
actual array is not a good idea. only pass it by reference if a
modified
version needs to be handed to the calling code via an actual
parameter.
im also wondering about php4 code thats now running under 5; such as
function &returnObject() ...
$a =& new SomeClass() ...
lets suppose, for the sake of arguments, i have my hands on a
codebase where
everything actually does count. the code was php4 and is now
transitioning
to 5. does anybody know if there would be a performance gain in
running the
whole thing through sed to try and strip out the unnecessary &
characters ?
any empirical data?
thx,
-nathan
in PHP5 by default Objects are passed by reference and as you can see
at this graph passing array by reference in PHP5 is slower
http://nathan.moxune.com/arrayVsArrayIteratorReport.php
Bojan Tesanovic
http://www.carster.us/
