Most modern websites fail Core Web Vitals because the amount of JavaScript shipped to the client is constantly increasing, which directly harms startup performance.
Hydration attempts to solve slow initial loads but introduces an 'uncanny valley' and performance overhead by re-executing the entire application on the client.
Qwik's resumability achieves constant-time startup performance by serializing listener information into the HTML, eliminating the need to re-execute components on the client.
A live demo shows how Qwik only downloads the minimal JavaScript code required for a user interaction at the moment it's needed, with a service worker prefetching chunks for a fast experience.
Qwik can move function closures between the client and server using `server$` and automatically tree-shakes data, serializing only what's necessary for client-side interactions.
The framework provides built-in components, like an image optimizer, that automatically prevent common issues like Cumulative Layout Shift (CLS) and generate responsive source sets.
The speaker answers audience questions about handling server-side secrets, Qwik's use of Vite, the future of resumability in other frameworks, and fallbacks for service workers.
Hubert Burda Media
München, Germany
Sensory-Minds GmbH
Offenbach am Main, Germany
44:35Misko Hevery
59:03Florian Rappl
46:13Miško Hevery
43:20Josh Goldberg
42:04Tamas Piros
14:44Chris Heilmann
40:24Clemens Helm
46:46Chris Ferdinandi
Jobs that call for the skills explored in this talk.
