In this episode, we dig into a really important performance issue when working with Livewire components—specifically around the use of the reactive
property inside a loop. We start off by filling up our database with a thousand posts to really stress-test our components, and then watch closely what happens in the browser's network tab as we scroll and interact with our list.
We quickly notice something: blindly adding reactive
to components inside a loop can slow things down a lot as more components re-render unnecessarily, especially when using infinite scrolling. Although using reactive
is fine for simple scenarios, it creates headaches when nested deeply like this.
The episode then walks step-by-step through fixing this by removing reactive
from the child components and introducing an event-driven approach instead. Rather than having every child chunk rerender, we only trigger updates on the component that actually needs it, dispatching an event with the right chunk index. We apply this both to adding and deleting items from our post list, keeping our UI up-to-date and responsive—but with more, but much faster, network requests.
There's a tradeoff discussed: a few extra requests in exchange for much slicker UI updates. Throughout, we recap what was done at each step, cover potential gotchas, and make sure you see the clear performance benefits of this approach compared to the original one. By the end, you'll see how to keep your Livewire infinite scroll implementations fast and reactive, without completely overwhelming your app.