Yes, I agree with you - I just don't see that as a failure of flame charts. You still need to understand how the data was gathered and what it really means. It

Yes, I agree with you - I just don't see that as a failure of flame charts. You still need to understand how the data was gathered and what it really means. It is also true that flame charts are more useful on projects that are not yet heavily optimized; they clearly show the parts that are very slow compared to others. And when you don't see anything else that can be optimized, it doesn't mean that everything is optimal - the limit is imagination (and knowledge), not the problem space.