gistfile1.js

var za = 'DIV';
var hey = function(){return false}



var t1 = (new Date()).getTime() ;
for (var i=0; i < 100000; i++) {
	if (!!za.match(/^a$/i)){
		hey()
	};
};
var t11 = (new Date()).getTime() ;
console.log(t11 - t1);





var t2 = (new Date()).getTime() ;
for (var i=0; i < 100000; i++) {
	if (za.toLowerCase() == 'a'){hey()}
};
var t22 = (new Date()).getTime() ;
console.log(t22 - t2);