Reaction

Outperforms RxCpp and Folly by 2-14x in dependency tests, enabling millions of updates per second for high-frequency applications like financial simulations.

Uses concepts and compile-time type checking to enforce safety, with value semantics that prevent memory leaks and common errors in reactive graphs.

Framework automatically constructs dependency DAGs, detects cycles, and prunes updates, eliminating manual wiring required in alternatives like RxCpp.

expr and calc provide React-like APIs that integrate naturally with C++, reducing boilerplate compared to verbose template syntax in other libraries.