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Mike Vitousek
f148e71f27
Summary: Change detection is desgined to determine whether rules of react have been violated, and to do so better we need to loosen Forgets assumptions about what kinds of values don't need to be memoized. For example, the compiler typically doesn't think of o.x as something that needs to be memoized, because it does not allocate. However, we want to compare o.x in the current render with o.x in a previous one, so we now insert a "memoization" (comparison, really) block around this value. The structure of this work is that we now add a reactive scope for identifiers if they originate from any instruction that could read from state that could have mutated between renders. This means that `LoadProperty` is always going to get a reactive scope; `LoadGlobal` will get a scope if we're not reading from something mutable, and `PrefixUpdate` won't (because the variable being incremented would have already been loaded and checked). Supersedes #30180. [ghstack-poisoned]
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.