Talk about Web Workers in JSday event on 18 July 2015

1. WebWorkers
multi-thread แบบง่ายๆด้วย Javascript

2. Why Workers?
• Javascript is single-thread by default
• Heavy usage decrease performance

3. HTTP/1.1 GET /messages

4. A programmer has one problem, he
decides to use threads to solve it.
He now has two problems

5. Worker

6. (Dedicated) Worker
Typical Worker
App Worker

7. Problem
App Worker
App Worker
App Worker
App Worker

8. Shared Worker
Shared-context Worker
App
Shared
Worker
App

9. Shared Worker

10. Problem
App
App
App
App
Worker Server

11. Service Worker
**This feature is only for experimental at this moment.**
App
Service
Worker
Cache
Forged
Other
Server
App
App

12. Service Worker
What we’re trying to solved?
• Too much workload on server.
• Failed miserably when offline.

13. Service Worker
Offline mechanism
Request Cached ? Cache
online ? Server
Fallback

14. Service Worker

15. Future of Worker
• More performance optimization.
• More specific type of Worker. (e.g. Audio, Image).

16. Demo

17. Discussion