[Timber] GC questions

1. Is there any good description of GC used on POSIX and on ARM? Why is the code for the GCs different (and could it be shared)? 2. Is there explanation of possible effects of the GC on real-timeness of the application in Timber? That looks like an important point to consider before embarking on writing real-time control in Timber. 3. (from my quick look at the rtsARM/gc.c) It looks like the GC only starts to work after the heap is 13/16 full. If that's true, I'm not sure it's the best policy: the processor may be cycle idly while it could have been collecting garbage (when the next planned event is not going to happen too soon). Thus when the event happens, it may get unnecessarily constrained by the small amount of free heap left. Ivan