Natively compiled classes

Hi! A few colleagues and I found our PHP scripts running very slowly due to the very processor intensive calculations on a site for a client. By intensive calculations, I mean encryption, random number generation, and prime verification, for some cryptographic algorithms. The code was very object oriented using lots of classes. We decided to write our own extension so that some of the code could be compiled natively, and avoid the PHP interpreter altogether. My question, is there any way of doing this with classes? I know I can write individual functions in C and build them into a module, but how can I do this with classes, if at all? TIA Stephano Mariani