Why was Ember 3x - 5x slower on Android?

Performance
60

An excellent blog post outlining hope for Android:

There’s a new browser benchmark which is considered much more representative of today’s webapps:

http://browserbench.org/Speedometer/

Some results:

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
OnePlus3                24
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/

2160×1920 548 KB

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.