Stability Without Stagnation: Lessons Learned Shipping Ember

on YouTube ↗01h 02m

" summary

Ember uses a disciplined pipeline — RFCs, feature flags, Canary → Beta → Release every six-week release cycle with LTS every fourth release — to land breaking changes predictably (features typically take 12–18 weeks from canary to release). Example: Ember.assign lands in 2.5 behind a flag and polyfilled for older versions; engines ship as an add-on plus small core kernel in 2.4. Glimmer 2 is integrated behind a flag and delivers measurable wins: roughly 1.5–2x initial-render, component-heavy pages up to 2–3x and much smaller templates, so the rewrite improves speed without breaking apps.

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" chapters (25)

1. 0:00Intro
2. 0:19Stability without Stagnation Learning from Ember.js
3. 1:37FAST WITH STABLE INFRA
4. 2:50SKYLIGHT
5. 6:42#allthelittlethings
6. 8:42Instability is a Drag on Innovation
7. 9:17Higher and Faster on a Stable Foundation
8. 10:31How do you get the feature in front of
9. 13:03Lifecycle of a Simple Feature
10. 14:53Likewise, Application Instance initializers still receive a single argument to initialize: application Instance'. ember-routing-routable-components Implements RFC adding support for routable components.
11. 19:45Ci runs with flags on and off - Disabled features are stripped from beta and release builds
12. 26:06Upgrade Cadence is
13. 33:36Lifecycle of a Big Feature
14. 33:55Engines
15. 38:17Would the acceptance of this proposal mean the Ember guides must be re-organized or altered? Does it change how Ember is taught to new users at any level? How should this feature be introduced and taught to existing Ember users?
16. 41:02Final Comment Period
17. 42:28After the RFC is merged, the process is identical to ember-assign
18. 43:42Catch the Next Train
19. 50:56Initial Render?
20. 51:11CANARY + GLIMMER 2 IS 1.5-2X FASTER THAN 2.4 ALREADY
21. 52:03GLIMMER 2 TEMPLATES ARE 5X SMALLER THAN HTMLBARS
22. 52:23asm.js experiments
23. 53:33Incremental?
24. 56:32Breakage
25. 56:46Semver (taken seriously) Deprecate to something • Internal or external rewriting • Deprecation Workflow

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