gistfile1.js

var functions = [],
    functionsLen = 0;

function buildMassiveString() {
	// build a ~1mb string
	return new Array(1024*1024).join('#');
}

function addListener() {
	var massiveString = buildMassiveString();
	functions[ functionsLen++ ] = function() {};
}

setInterval(addListener, 100);