Currently, the API of SimpleMemoryUsageTracker is such that the call to add() must be followed by a call to withinMemoryLimit() to see if we should hit an assertion that we have used too much memory. We should consider a different API where the call to add() throws if we would exceed the _maxAllowedMemoryUsageBytes by performing this add().

Maybe this should also be applied to the MemoryUsageTracker class as well?

CC Nicholas Zolnierz