best scheme/lisp for real time code

Is Chicken a good idea? I am worried about the way it does GC. Exhausting the stack seems a bit... Java. I'm looking at Gambit too but I don't know much about it yet.

Whatever I end up using needs to work on ARM. It doesn't have to target C as long as it has FFI and short GC pauses (I am aiming for less than 5ms.)

>>1

My latest implementation of Symta doesn't do GC, just stack, so local data (that doesn't get returned) gets freed immediately. The trade off is write barrier, because we need to detect write to the lower stack levels. Purely functional code doesn't really gets affected by that.