Array languages like APL/K/J can be tremendously fast for an interpreter, since each bytecode works on entire arrays at a time. Not quite as fast as say, C or

Array languages like APL/K/J can be tremendously fast for an interpreter, since each bytecode works on entire arrays at a time. Not quite as fast as say, C or C++ compiled with a modern compiler, but I think they can match other static languages. And of course, when you're branching on or processing single values rather than whole arrays/matrixes, you lose the speed benefit.