@soegaard2 @massung I pushed a repair for CS garbage collection. I haven’t yet import BC’s minor-collection heuristic to CS, because it seems difficult to reason about and specific to a loop that allocates and immediately forgets giant memory blocks. I’m not even sure the heuristic was intentional for BC; it may be an accidental effect of forgetting to add in generation 0’s memory use in the conditional to decide on a major collection.

TY both for the info