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Mike Vitousek
29019bf6ec
Summary:
This work enhances the don't-drop-memoization mode to not memoize the arguments to useMemo and useCallback (or technically, to memoize them in the same block as the hook call -- but since hooks can't be memoized, this is equivalent to never memoizing them). The advantage here is that we preserve the source-level code structure around memoization callbacks more, and avoid the compiler bug of having function expression dependencies be unconditional when their actual semantics are conditional.
This conceptually replaces some of the work of #30177: some of that was motivated by avoiding the deps bug, and the rest of the motivation was to better exercise the compiler's semantics, which was really happening as much as I'd hoped, as mofeiZ explained to me in that PR and offline!
ghstack-source-id: 0f4fc6f13f
Pull Request resolved: https://github.com/facebook/react/pull/30377
React Compiler
React Compiler is a compiler that optimizes React applications, ensuring that only the minimal parts of components and hooks will re-render when state changes. The compiler also validates that components and hooks follow the Rules of React.
More information about the design and architecture of the compiler are covered in the Design Goals.
More information about developing the compiler itself is covered in the Development Guide.