Which nicely shows what is pretty much a fundamental rule of thumb - adding complexity to a system has to be carefully managed to ensure that the end result is

Which nicely shows what is pretty much a fundamental rule of thumb - adding complexity to a system has to be carefully managed to ensure that the end result is going to perform better on average than the simpler version would have done. I'm reminded somehow of caching overly aggressively and the resultant code spending more time in the cache logic than it saves through not having to do the calculations.