Yeah, I've had fun using macros to create optimised functions at runtime (inline caching effectively) and/or generate code that is more friendly to the JVM JIT.

Yeah, I've had fun using macros to create optimised functions at runtime (inline caching effectively) and/or generate code that is more friendly to the JVM JIT. Also, there's always plenty of use for doing work at compile time. In some sense they can also be seen as a better code generation.