> This makes it clear, in context, that Knuth defines "Premature Optimization" as "optimizing before you profile your code" As with that Google testing talk ("

> This makes it clear, in context, that Knuth defines "Premature Optimization" as "optimizing before you profile your code" As with that Google testing talk ("We said all your tests are bad, but that's not entirely true because most of you don't have any tests"), the reality is that most people don't have any profiling. If you don't have any profiling then in fact every optimisation is premature.