(function() {
	var x = "my_very_long_string"; /* shouldn't this one be local? */
	y = function() {
		console.log("foo" + x);
		console.log("foo" + x);
		console.log("foo" + x);
		console.log("foo" + x);
	};
})();

/* ... will be minified as: */

(function(){y=function(){console.log("foomy_very_long_string");console.log("foomy_very_long_string");console.log("foomy_very_long_string");console.log("foomy_very_long_string")}})();

/* Why not like this? */

(function(){y=function(){var x="my_very_long_string";console.log("foo"+x);console.log("foo"+x);console.log("foo"+x);console.log("foo"+x)}})();