If your app is slow, the advice is to lazy-load your code and execute less code on startup. That is excellent advice, but it is much harder than it seems because of how hydration works in today's frameworks. Hydration forces the execution of application code, preventing you from lazy loading most of the code on the page. To prove the point, let's build a simple counter and see how hydration will thwart our ability to lazy load it or minimize the amount of code executed.