From #84:

Just as a general heads up - the problem with run into with AICI in production is the case where there are more sequences in batch (and thus parallel controller processes) than cores. This is because I spin for a while on futexes (to minimize latency), and this kills performance when we're out of cores. This would need to be fixed somehow. The latency minimization was mostly there when we still had post/pre_process(); for mid_process() it shouldn't matter that much.

Originally posted by @mmoskal in #84 (comment)