new Object vs. {} benchmark

gistfile1.js

function benchmark() { // ...
    for (var i = 0 ; i < arguments.length ; i += 1) {
        var startTime = new Date(),
            fn = arguments[i];
        for (var j = 0 ; j < 10000000 ; j += 1) {
            fn();
        }
        console.warn(arguments[i].name + ": " + ((new Date().getTime() - startTime) / 1000).toFixed(3));
    }
}

function newObject() {
    var a = new Object;
}

function objectLiteral() {
    var a = {};
}

benchmark(newObject, objectLiteral);