Barely. Nothing has changed in the stack. Robert has discovered and eliminated a series of bottlenecks, causing performance to oscillate about tolerable. Fin

Barely. Nothing has changed in the stack. Robert has discovered and eliminated a series of bottlenecks, causing performance to oscillate about tolerable. Finding bottlenecks is not trivial, because Arc has zilch in the way of profiling, but fortunately Robert is good at this sort of thing.