Abstract: Systems and methods for increasing the execution speed of external API functions invocation and runtime checks. The techniques for generating invocation stubs for an application programming interfaces embedding with functions overload resolution so that a script or program written in a dynamic high-level programming language may reuse existing code base from other high-level programming language and be more flexible than traditional approaches. The method further involves compiling the high-level code templates to native code to obtain optimized native code templates, using an optimizing compiler subsystem designed for runtime use with the virtual machine. With some of the described techniques, invocation stubs are generated by a compiler, when a corresponding API import instruction is encountered at runtime, and those stubs bridge an application programming interfaces to the actual programming language for usage.