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.)

>>8
Ok, so not like linear types at all.

So far, so good. The write barrierers--are they used to keep the references from older stack frames valid when moving data? Or have I misunderstood?

Another question: have you profiled the write barriers? How often are they needed? I'm not sure what you would use for a benchmark. Maybe I should just take a look at it myself. Is the source available?