sendMIDIMessage() wrapper speed

sendMIDIMessage.html

<script>
    var sendMIDIMessage = (function () {
        var counter = 0;
        return function (arr) {
            counter++;
            if (counter % 1000000 === 0) {
                console.log(counter + " messages");
            }
        };
    }());

    var noteOn = (function () {
        var x = new Uint8Array(3);
        return function (channel, noteNumber, velocity) {
            var arr = x;
            arr[0] = 0x90 + channel;
            arr[1] = noteNumber;
            arr[2] = velocity;
            sendMIDIMessage(arr);
        };
    }());

    var noteOn2 = function (channel, noteNumber, velocity) {
        sendMIDIMessage(0x90 + channel, (noteNumber << 8) | velocity);
    };

    function test(noteOn, N) {
        for (var i = 0; i < N; ++i) {
            noteOn(5, 60, 64);
        }
    }

    function timeit(test, fn, N) {
        var start = Date.now();
        test(fn, N);
        var stop = Date.now();
        console.log(stop - start);
        return stop - start;
    }

    document.write(timeit(test, noteOn, 10000000));
    document.write("<br/>");
    document.write(timeit(test, noteOn2, 10000000));
</script>