Find a workaround to minimize the performance drop caused by frequently repaint + reflow

[normanzb]

[kates]

Have you tried underscore's throttle function? http://documentcloud.github.com/underscore/#throttle

[mikaelkaron]

So what I think we want to do is to render into a DOMFragment and attach to the DOM once the promise returned from .weave is fulfilled. As long as the initial rendering is done in sig/start we should only get one DOM insertion even if there are multiple child widgets.