Just a simpleLRU cachewritten in javascript. It is loosely based on ASP.NET's Cache, and includes many caching options such as absolute expiration, sliding expiration, cache priority, and a callback function. It can be used to cache data locally in the user's browser, saving a server roun...
方式一:map实现 class LRU { constructor(size) { this.size = size; this.cache = new Map(); } get(key) { if (this.cache.has(key)) { ...
但是想想房价都那么高了,内存空间同样也是珍贵的(呜呜呜),所以必须有一些规则来管理缓存的使用,而LRU(Least Recently Used) Cache就是其中之一,直接翻译就是“最不经常使用的数据,重要性是最低的,应该优先删除”。这个规则还满人性化的,经常访问的,肯定相对更重要。 需求分析 假设我们要实现一个简化版的这个功能,...
【缓存未命中且队列未满】 当插入元素未命中缓存,则创建该元素的节点,并直接在环形双线链表的 root 之前插入节点,cache[key] 赋值为插入节点 【缓存未命中且队列已满】 此时需要触发 LRU 缓存淘汰算法,此时将 root 的 key 与 result 分别赋值为待插入节点对应的值,向后移动 root,将 root 的 key、result 分别...
[LeetCode][JavaScript]LRU Cache LRU Cache Design and implement a data structure for Least Recently Used (LRU) cache. It should support the following operations:getandset. get(key)- Get the value (will always be positive) of the key if the key exists in the cache, otherwise return -1....
Simple LRU cache in JavaScript The implementation is inspired by node-lru-cache by Isaac Schlueter. The motivation of this project is to provide Object.create fallback in order to work on IE8. Installation With npm $ npm install simple-lru With Component $ component install smagch/simple-lru...
lru-cache lru-cache 用于在内存中管理缓存数据,并且支持LRU算法。可以让程序不依赖任何外部数据库实现缓存管理。 LRU算法:尽量保留最近使用过的项 可指定缓存大小 可指定缓存项过期时间 const LRU = require('lru-cache'); const cache = LRU({ max: 500, ...
接下来我们来实现一个缓存列表也就是双链表结构的构造类LRUCache。 classLRUCache{/** * Creates a cache instance of a specific capacity. * @param {number} capacity */constructor(capacity){this.capacity=capacity;// How many items to store in cache at max.this.nodesMap={};// The quick links...
As of version 7, this is one of the most performant LRU implementations available in JavaScript, and supports a wide diversity of use cases. However, note that using some of the features will necessarily impact performance, by causing the cache to have to do more work. See the "Performance...
As of January 2022, version 7 of this library is one of the most performant LRU cache implementations in JavaScript. Benchmarks can be extremely difficult to get right. In particular, the performance of set/get/delete operations on objects will varywildlydepending on the type of key used. V8...