Performance of using static methods vs instantiating the class containing the methods

Question

I\'m working on a project in C#. The previous programmer didn\'t know object oriented programming, so most of the code is in huge files (we\'re talking around 4-5000 lines)

Answer 1

It's not valid in PHP,
Object Method is faster :
http://www.vanylla.it/tests/static-method-vs-object.php