Demo of embers original performance with dbmon along with angular and react https://www.youtube.com/watch?v=z5e7kWSHWTg
These demos are like listening to MongoDB talk about how great MongoDB performs. Always better to look for yourself or check a trusted third party.
Here's an angular dbmon that is at least using track by. I didn't write it. http://run.plnkr.co/plunks/Uu7w8p7jiPEJp5lLHWbB/
Be careful, it is very slow and may crash your browser.