transitory/src/cache/expiration/MaxAgeDecider.ts

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

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

/**
 * Decider for how long something stays cached. Takes in the key and the value
 * and should return a maximum age in milliseconds.
 */
export type MaxAgeDecider<K extends KeyType, V> = (key: K, value: V) => number;