setTimeout-based entropy

random.js

// please forgive the one letter variables, this is a gist

// the setTimeout must be called sequentially, or else the
// runtime will execute all of them at the same time,
// giving the same value

function random(m, cb) {
	var t = Date.now();
	setTimeout(function() {
		cb(Date.now()-t);
	}, m);
}

function randomTimes(x, m, cb) {
	function next() {
		if ( i == x ) return cb(a);
		random(m, function(v) {
			a[i] = v;
			i++;
			next();
		});
	}
	var a = [];
	var i = 0;
	next();
}

// example

randomTimes(20, 0, function(a) { console.log(a); });