TTLMap

Wraps JavaScript's Map with a Time To Live (TTL). For long running programs, this can help prevent memory leaks in certain cases.

Features

• Drop in replacement for Map
• Adds a Time To Live to Map Values, defaults to Infinity
• Supports all versions of Node.js 0.11+
• Robust and well tested
  • 100% test coverage
  • Simple, easy to maintain, code base.
• Lightweight codebase with No dependencies

Use case

If you store callbacks for outbound connections that you expect an eventual reply to, you may find that a reply never comes. For a single request, this may not be a big deal, but for a long running process over billions of requests you may find your process runs out of memory. Setting an upper limit to the amount of time you will hold onto a callback for any request will allow you to protect against memory leaks.

Usage

Exactly the same as a Map (including the es6 for...of syntax), except for one notable exception:

var Map = require('ttlmap');
var m = new Map();

m.set('foo', 'bar', 1000);

There is an optional third parameter for Map.set, a TTL in milliseconds. The same assurances of setTimeout are made of TTLs, there is no guarantee of precise timing nor of ordering.

License

GPLv3