Jay Meistrich (@jmeistrich) / X

Jay Meistrich

3,192 posts

Jay Meistrich

@jmeistrich

@LegendAppHQ @bravely_io @margelo_com. Been a digital nomad for 14 years. Talk to me about Legend State, Legend List, web perf, productivity, and traveling.

Europe

Joined January 2009

@jmeistrich

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Jay Meistrich
@jmeistrich
May 28
Legend List 3.0 is here! 🎉 ✨ React DOM support ✨ Even faster, more stable ✨ Perfect initial scroll ✨ KeyboardAwareLegendList for chat and AI apps ✨ Reanimated item transitions ✨ So much more! It’s been almost 1,000 commits since v2, super excited to finally release it!
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Jay Meistrich
@jmeistrich
Apr 23, 2025
Legend List 1.0 is LIVE! The ⚡️ fastest React Native list library, in 100% JS, with powerful new features. For new and old arch. ✨ maintainContentVisiblePosition ✨ Bidirectional infinite scrolling ✨ Chat UI without the inverting hack I hope it helps make your apps better!
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Jay Meistrich
@jmeistrich
Nov 10, 2024
I think I found a way to make a React Native list component with significantly better performance than FlashList, with 100% javascript. I'm still testing it but as far as I can tell there’s no pitfalls or issues… It just requires the new architecture for synchronous onLayout.
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Jay Meistrich
@jmeistrich
Sep 30, 2022
I just published "Making React fast by default and truly reactive” describing how with Legend-State we can change React components to render only once, delete all the normal hooks, write less code, and make React much easier to use. legendapp.com/open-source/le…
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Jay Meistrich
@jmeistrich
Jul 12, 2025
Coming soon, a big rewrite of Legend List that: - is much simpler internally - improves performance - makes initialScrollIndex and scrollToIndex/End perfectly accurate - fixes many bugs - deletes 10% of the code - takes mount time from pretty fast to ZERO
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Jay Meistrich
@jmeistrich
Jan 20, 2025
Legend List 1.0 beta is ready! It started as a performance experiment, but it ended up solving a lot of the major issues with lists in React Native. 🎉 ✨ Better perf than FlashList ✨ maintainContentVisiblePosition ✨ Bidirectional infinite lists ✨ Chat UI without inverting
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Jay Meistrich
@jmeistrich
May 18, 2025
I'm trying to make the fastest Mac app you've ever seen. So of course I'm building it in javascript with React Native. It'll be an app for managing Github issues, PRs, discussions. 🔌 Local first 🛜 Works offline ⚡️ Instant interactions 💾 App is 50mb, 100mb ram 👐 Open source
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Jay Meistrich
@jmeistrich
Aug 18, 2025
Legend List 2.0 is now in beta! ✨ Improved performance ✨ Perfectly accurate scrollToIndex ✨ Mount time on new arch goes from pretty fast to ZERO ✨ Sticky headers ✨ estimatedItemSize is now optional ✨ Fixes many bugs
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Jay Meistrich
@jmeistrich
Sep 5, 2025
Legend List 2.0 is LIVE! The ⚡️ fastest React Native list library, in 100% JS, now with more accuracy and speed! ✨Perfectly accurate scrollToIndex ✨Even faster ✨Zero mount time on new arch ✨Sticky headers ✨estimatedItemSize is optional ✨New and old arch
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Jay Meistrich
@jmeistrich
Nov 23, 2024
Legend List 0.3.0 now has 0 dependencies and is just 3kb gzipped. I replaced Legend State with a tiny signaling system that does the same optimizations. And optimized a few more things too, so it's even faster 😀 ✨ 100% JavaScript ✨ 0 dependencies ✨ 3kb ✨ Fast!
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Jay Meistrich
@jmeistrich
Oct 14, 2025
LegendList 2.0.12 is much faster than earlier versions, so I recommend updating ❤️ It now runs tighter loops, does less math, and better uses scroll velocity to predict what will be in view next frame. So it leaves more frame time for your components to render ✨
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Jay Meistrich
@jmeistrich
Oct 13, 2025
I first had the crazy idea to try to make a faster list library almost a year ago! And after a full rewrite for v2, and tons of optimizations through to the latest 2.0.12, I'm very pleased that Legend List is really fast 🎉
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Jay Meistrich
@jmeistrich
Nov 20, 2024
Legend List 0.1 is ready to test! This is an early version to see how well it works in real apps so please post issues and/or PRs 🙏. It’s only ~600 lines so it should be easy to understand and tweak. ✨ 100% JS ✨ Fast ✨ Dynamic sizing ✨ Works in both new and old arch
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Jay Meistrich
@jmeistrich
Aug 6, 2025
Legend List for React DOM coming soon, launching September 4 at @reactuniverse_. The goal is to be faster than every other list library on both mobile and web.
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Jay Meistrich
@jmeistrich
Oct 17, 2025
I finally cracked my Legend List web white whale - infinitely scrolling up with dynamic sizes, loading more pages on demand while scrolling. With no blank spaces, scroll jumping, or jank. It's looking very promising 🎉 It's still early but you can try it now in 2.1.0-beta.1
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