# francisco@xxxxxxxxxx / 2007-01-26 20:40:34 +0100:
> I've written this to check memory consumption of PHP5 objects, because
> I'm having memory problems with an OO XMLParser that I've written.
It measures something else though. The memory manager doesn't allocate
memory for individual variables in PHP.
> $ php MemTest.php
> Obj1 uses 208 bytes
> Obj2 uses 168 bytes
> Obj3 uses 200 bytes
> Obj4 uses 200 bytes
> Obj5 uses 200 bytes
> Obj6 uses 200 bytes
>
>
> I understand that first instance may be bigger than next ones because
> method allocation and other things of that kind
No.
> but I do not understand why second instance is smaller than third :-?
It's not.
> In any case, my second question is: Isn't too much memory 200 bytes for
> a so simply object??
It's not memory consumption of that object.
> And the third: Is there any manner to get more compact objects in PHP5?
You need to measure something before you want to compare it ("more
compact" than what?)
> class dummy {
> protected $a;
>
> public function __construct ( $a ) {
> $this->a = $a;
> }
> }
>
> $before=0;
> $memdiff=0;
>
> $before = memory_get_usage();
What's $before here?
> $obj1 = new dummy (0);
> $memdiff = memory_get_usage()-$before;
> echo "Obj1 uses $memdiff bytes\n";
>
> $before = memory_get_usage();
What's $before here?
> $obj2 = new dummy (0);
> $memdiff = memory_get_usage()-$before;
> echo "Obj2 uses $memdiff bytes\n";
--
How many Vietnam vets does it take to screw in a light bulb?
You don't know, man. You don't KNOW.
Cause you weren't THERE. http://bash.org/?255991
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
