http://expo.io/

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React Compiler will apply to all React apps including both those that use react-dom and react-native. It will automatically insert memoization where possible for modest performance improvements that are already possible to achieve today with e.g. useMemo. So in that sense it will make React better but it’s not magically going to make an unsuccessful app a successful one for instance.

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First, I want to say it's amazing what this kid has made. He definitely has a huge future. With that being said, this project is worthless for 99% of real world projects. It's not exactly a "replacement" for React's VDOM. Mostly what it is doing is adding a wrapper around each React component that renders an empty component with a useEffect and a ref. The useEffect triggers Million to modify the ref directly, which is how it prevents React from updating anything. That all sounds OK, but the huge drawback is Million's custom rendering does not work for conditional rendering (e.g. return isHappy ? : ), and any children MUST be either blocks (the Million wrapper) or native HTML (say goodbye to third-party components). When Million does encounter these, it creates a new root and lets React handle it. EDIT: This version of Millionjs does not make any claims about First Contentful Paint improvements. Original comment below I'm also skeptical of it's first contentful paint speedup claims. Since useEffect will only run after the page has already returned control the browser, the first contentful paint is just going to be the empty component wrappers. I doubt this is being properly measured, as there are also comments like this in the source code : PLEASE DO NOT USE THIS IN PRODUCTION. This is technically a proof-of-concept and is _highly_ experimental. Currently, it is mainly used for optimizing the JS Framework Benchmark implementation More on reddit.com

Wtf?

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