node-cache-engine (supports browser and node)

Simple and High performing cache engine package for node/javascript. It using default cache replacement is LRU (Least Recently Used) cache engine and hash table as javascript Map Object.

Installation

npm install --save node-cache-engine

import { createCache } from 'node-cache-engine';

const cache = createCache(); // creating instance of cache with default configuration

cache.add('key', 'value'); // add into cache
cache.get('key'); // get from cache
cache.has('key'); // checking from key is existing in cache
cache.remove('key'); // removing from cache
cache.size(); // get the size of cache

Option for creating cache instance

import { createCache } from 'node-cache-engine';

const cache = createCache({
  size: 100, // Maximum size for the cache. default value is Number.MAX_SAFE_INTEGER
  engine: 'LRU', // cache replacement engine default is LRU (Least Recently Used)
  HashTable: YourCustomHashTable, // for custom hash Table. default hashTable is 'src/dataStructure/HashTable.js'
});

Supported cache replacement engines and options

| Engines Name | key | supported options | | --------------------- | --- | ----------------- | | Least Recently Used | LRU | HashTable, size | | Least Frequently Used | LFU | HashTable, size |

Time complexity of engine methods

Methods available on cache engines

Creating Custom HashTable

When and Why you should create custom hash table?
The default hash table implemented with Map. If you want much more performance than default you can implement your own (like node wrapped c++ hash table). I think 1 to 5 million cache entry default hash table is fine if your use case is more than this go for custom hash table.

To implement custom hashTable you have to use methods with symbols name provided from the package. example

Next?

• TTL engine
• TTL combining with LRU engine