An excellent blog post outlining hope for Android:
There's a new browser benchmark which is considered much more representative of today's webapps:
Skylake i7 Chrome 184
iPhone 7 111
iPad Pro 85
iPhone 6s 82
Skylake i7 FF / Edge 64 (same result)
iPad Air 2 48
iPhone 5s 32
Nexus 6p 23
Google Pixel Phone 20
Nexus 5x 15
Galaxy S7 12
2013 Moto X 10
2012 Nexus 7 10
iPhone 4s 10
iPhone 4 3
(Some Android users report up to about 29 score on very new late 2016 Android devices, depending on the vagaries of the browser used. Still below the 2013 iPhone 5s which can be purchased used for about $150 these days.)
Ember.js is one part of the Speedometer test. Let's drill into that. Here's the latest version of Ember.js (2.10) comparing Google Pixel phone and iPhone 7, latest updates on all -- on http://emberperf.eviltrout.com/
Note that earlier versions of Ember, prior to 2.10 and Glimmer 2, were 15x slower on Android so being "only" 10x slower than iOS is ... actually an improvement.
But, good news -- they're looking and they have a new benchmark to target that actually includes ember.js! They've said many of the key optimizations in Chrome/Android should land in 2017, probably 1st half.
Let me just say that cough I am SUPER looking forward to the year 2017 for Android/Chrome.