The issue: PHP5 has cool OO features OO is cool, but sometimes just overhead Each object consumes a lot of memory in PHP Each mezthod call consumes a lot of time in PHP value = $int; } } ?>]]> Nice OO, but much too much overhead in PHP The solution: Knowing where the limits are Do not implement every data structure as a class, arrays are useful, too Don't split methods too much, think, which code you will really re-use You can always split the code of a method later, when needed Do you really need a that deep class tree? Before applying a cool OO pattern, think if it really fits your case