Here are the images of timelines Backbone http://imgur.com/yeffaUc Ember http://imgur.com/RmObUuO

Some observations.. lot of scripting in Ember implementation

Lot of recalculate in Backbone implementation

Backbone reaches complete heap size memory very fast than Ember(Interesting when you think Ember actually has lot of objects created) There is some kind of destroy happening(Even when this is just a snapshot of millisecs) in Ember which you observe by dips.

Althgh Backbone looks good, Memory usage wise think Ember is better