You Don't Know Js: Async & Performance Apr 2026

The secret sauce for making async code look and behave like synchronous code (the foundation of async/await ).

Understanding that JS doesn't actually have a concept of "time"—only a queue of events. You Don't Know JS: Async & Performance

The book shifts your mindset from "This happens, then that happens" to "This happens, then the event loop gives us a chance to do that." It’s the difference between writing code that works and writing code you can trust. The secret sauce for making async code look

Beyond just "fast code"—thinking about Web Workers, SIMD, and benchmarks that actually matter. then that happens" to "This happens