You've probably seen pages that render instantly and others that hang on a blank screen for seconds. Often, the difference comes down to whether critical resources fit within the first network round trip—roughly 14KB. This constraint comes from TCP's congestion control mechanism and has practical implications for how…

In part 1, we moved heavy computation off the main thread using Web Workers. The UI stayed responsive while a background thread crunched our 100k records. Problem solved, right? Not quite. Web Workers have a hidden cost that becomes painfully obvious as your datasets grow: data cloning. When you send a large…

Have you ever clicked a button and watched the entire page freeze? No scrolling, no hover effects, just a stuck interface. This frustrating experience often happens when a web application needs to process a lot of data. The detailed reason lies in how browsers work: JavaScript is single-threaded. This means it can…