This is some great progress! But I should say that there is still too much overhead in using STM; you will still be able to very easily (and by a large margin

This is some great progress! But I should say that there is still too much overhead in using STM; you will still be able to very easily (and by a large margin) outperform STM-4 by running 4 instances of Tornado with HAProxy or some other lightweight router ontop. A comparison graph for this should have been the benchmark.