[TIMOB-26699] Windows: Runtime Performance Improvement

Peformance has been the issue on Windows for a long time. From what I observed, some basic JavaScript operations (like calling constructor, accessing properties and functions) against Titanium proxy objects are simply slow. For instance, creating 200 proxy objects on Windows (Titanium 7.4.0.GA) takes about 2 seconds on Windows locally for me.

var win = Ti.UI.createWindow({ backgroundColor: 'green' });

win.addEventListener('open', function() {
    var start = +new Date();
    for (var i = 0; i < 200; i++) {
        win.add(Ti.UI.createView({
            width: 50, height: 50, left: i * 10, top: i * 10
        }));
    }
    // setTimeout() effectively push tasks on UI thread.
    // This can be useful when you need to see actual UI response time.
    setTimeout(function() {
        alert((+new Date() - start) + ' m seconds elapsed');
    }, 0)
});
win.open(); 

We might be able to "gradually" improve performance by fixing following areas: * UI rendering engine ... I expect there could be some redundant rendering calls that can be optimized. * Optimize WinRT API call ... Passing WinRT boundaries are horribly slow. We want to eliminate the calls as much as we can * HAL ... It is heavy weight framework that is not quite efficient. We might be able to make it more lightweight.