transitory/src/cache/loading/Loader.ts

In-memory cache with high hit rates via LFU eviction. Supports time-based expiration, automatic loading and metrics.

import { KeyType } from '../KeyType';

/**
 * Function used to load a value in the cache. Can return a promise or a
 * value directly.
 */
export type Loader<K extends KeyType, V> = (key: K) => Promise<V> | V;