Always complete each use case from scratch in the simplest and most efficient non-abstract form. Then try to merge use cases into an abstract framework. Accept

Always complete each use case from scratch in the simplest and most efficient non-abstract form. Then try to merge use cases into an abstract framework. Accept the abstractions if: - the stack trace depth is never greater than double - the total code size is decreased - performance/memory hit is less than 10% Thank you for bringing this up.