React Fast Compare

React Fast Compare is a highly optimized library for deep equality comparison, primarily designed for performance enhancements in React applications, specifically with `React.memo` and `shouldComponentUpdate`. Based on `fast-deep-equal`, it extends functionality to handle React-specific circular references, such as those found in React elements, while generally avoiding non-React circular references. The current stable version is 3.2.2, with recent patch releases indicating active maintenance. It boasts a minimal bundle size (under 660 bytes minified+gzipped) and broad compatibility, working in Node.js (0.10+) and browsers (IE9+) due to its ES5 compatibility. This library differentiates itself by offering equivalent speed to `fast-deep-equal` for generic data types, coupled with crucial guardrails for React-specific data structures, making it a robust choice when deep equality checks are truly necessary after performance profiling.