ECL. From a pure Lisp perspective, it's maybe not the really very best choice, but from an OS viewpoint, it's simply the most convenient for my tasks (Apple, W

ECL. From a pure Lisp perspective, it's maybe not the really very best choice, but from an OS viewpoint, it's simply the most convenient for my tasks (Apple, Windows, Linux, free, really fast inline C FFI). Compressed its size can be as small as 1(!) MB on some OS.