vs-cache

Limit the number of calls to a function by caching the results of execution

vs-cache

Limit the number of calls to a function by caching the results of execution

npm install vs-cache

First, define an asynchronous function that should be cached:

var task = function task ( callback ) {
  var execute = function ( ) {
    callback(null, new Date().getTime());
  }
  
  var timeout = 10 * Math.random() | 0;
  
  setTimeout(execute, timeout);
}

Second, use cache to retrieve the result of running the task

var cache = require('vs-cache');
 
var cachedTask = cache.create(task, 50);
 
cachedTask.retrieve(function callback ( errorvalue ) {
  console.log('retrieved result: ' + String(error || value));
});

MIT