Scheduling Derivations in Reactivity

A deep dive into scheduling strategies in reactive systems, exploring the tradeoffs between immediate, lazy, and scheduled evaluation of derived state. Covers reactive ownership and memory management, React's three-phase execution model, how SolidJS achieves concurrent rendering via scheduled computeds, and the challenges of async derivations including waterfall problems. Proposes splitting effects into tracking and effectful phases to preserve lazy derivations while maintaining predictable phased execution. Concludes that async values should generally be scheduled rather than lazily evaluated to avoid waterfalls.