How is initial render performance currently? If I recall correctly, Glimmer 1.x unintentionally slowed down initial render performance. Has this been or will this be addressed?
We're running Ember 2.2 on Intercom and we've found it to be faster than 1.x. In addition to this, it looks like Glimmer 2 will bring significant render time improvement for both initial render and subsequent DOM updates.
In addition, Glimmer 2 is near completion, and when ready will provide further speed ups to initial rendering.