This look pretty neat (although you have to fast-forward the "animations"...), but two things are not clear to me: 1) I see some fine-grained data decomposition

This look pretty neat (although you have to fast-forward the "animations"...), but two things are not clear to me: 1) I see some fine-grained data decompositions, but what about coarse tasks when the overhead is high? 2) I've never looked into Clojure so far (sorry :) but how does this compare to OpenMP(I)? Or even with Python's parallel processing capacities, how much performance difference would be between, e.g., a C oMP and Clojure parallel processing implementation have? Or to Python's multiprocessing.JoinableQueue and Manager? Would it be worth the switch?