mongez-reinforcements-lazy

Memoization breaks circular imports in TypeScript by deferring heavy computations until first access. This prevents eager evaluation during module initialization, safely isolating dependency cycles and startup bottlenecks.

Deferred computation delays costly calculations until their results are accessed. You need lazy values when managing complex module dependencies to prevent eager evaluation and avoid slowing down application startup.

You memoize asynchronous producers using lazy.async, which creates memoised promises. This ensures the asynchronous operation runs once and caches the resolved value for subsequent accesses across modules.

Yes, you can use lazy.from to provide pre-resolved lazy values for testing. This maintains symmetry with lazy producers while injecting deterministic, ready-to-use data without executing actual computation logic.

You use the isLazy type guard to safely narrow variable types to Lazy values. This verifies whether a value is a memoised lazy producer, ensuring type safety before attempting to resolve it.

Memoized lazy values run producers only once, meaning subsequent calls receive cached results without re-evaluation. This deterministic semantics approach is unsuitable if your computation requires fresh results on every access.