I think what could be considered an early optimization (but not premature) is the architecture design of your software. I dont know how you did your applicatio

I think what could be considered an early optimization (but not premature) is the architecture design of your software. I dont know how you did your application, but in this example, you could have made the design choice of a heavily multithreaded application to fetch and process multiple pages at the same time. It could be an early optimization that saves you a lot of refactoring later.