As discussed with Samuele & others, we have to decide what to do with profiling, since cProfile information is sort of pointless. Unladen swallow people seem (with success) to interface oprofile, which also has hooks for JVM, so it's already easier. Links: http://oprofile.sourceforge.net/doc/devel/index.html http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/ExecutionEngine/JIT/OProf... any thoughts? Cheers, fijal