JIT/compiler Java language extensions to enable field performance and serviceability

1. Technical Field The present invention provides a method and apparatus in a data processing system for optimizing running of bytecode. An application programming interface is called for compilation of bytecode. The bytecode just in time compiling is enabled or disabled using the application programming interface. Compiling the bytecode is optimized by the programmer before compiling using pre-compile keywords. Compiling the bytecode is optimized during compiling using dynamic application programming interface calls. Dynamic runtime APIs enable or disable the just in time compiling of objects based on compiling errors, execution performance and frequency of execution.