Rich Harris on fine grained reactivity and async first frameworks

Rich Harris joins the podcast to discuss his talk, fine-grained everything, exploring fine-grained reactivity, frontend performance, and the real costs of React Server Components and RSC payloads. Rich explains how Svelte and SvelteKit approach co-located data fetching, remote functions, and RPC to reduce server-side rendering costs, improve developer experience, and avoid unnecessary performance overhead on mobile networks. The conversation dives into async rendering, parallel async data fetching, type safety with schema validation, and why async-first frameworks may define the future of JavaScript frameworks and web performance. Links X: Github: Bluesky: Resources Modern front-end frameworks like Svelte are astonishingly fast at rendering, thanks to techniques such as signal-based fine-grained reactivity. But there's more to performance than updating the screen at 60 frames per second. In this talk, we'll learn about new approaches that help you build fast, reliable, data-efficient apps. Slides: We want to hear from you! How did you find us? Did you see us on Twitter? In a newsletter? Or maybe we were recommended by a friend? Fill out our listener survey ! Let us know by sending an email to our producer, Elizabeth, at elizabeth.becz@logrocket.com , or tweet at us at PodRocketPod . Check out our newsletter !

You can listen to Rich Harris on fine grained reactivity and async first frameworks online on Radio and Podcast. Open the player on this page to stream the available audio.

Rich Harris on fine grained reactivity and async first frameworks is an episode from PodRocket - A web development podcast from LogRocket by LogRocket.

This episode is 41:13 long.

This episode was published on Feb 5, 2026.

Yes. Use the heart button on the episode page to add it to your favorite episodes list.

Yes. This page shows related episodes from PodRocket - A web development podcast from LogRocket when more episodes are available from the podcast feed.