That was just to demonstrate the problem. You could solve it by using NSolve[expr, vars] and giving a limit for the response time you'd like. You'd get back the

That was just to demonstrate the problem. You could solve it by using NSolve[expr, vars] and giving a limit for the response time you'd like. You'd get back the number of dyne's you'd need to meet those requirements. On heroku's side, you could model their network with a few lines of code and experiment with different types of queues to find things that work well and are affordable. As PG said in beating the averages, it's one o those things that's easy to dismiss when you're looking up the power curve.