1. Dart
2. dart:html
3. WorkerPerformance
4. timeOrigin property

WorkerPerformance class

1. Properties
2. hashCode
3. memory
4. on
5. runtimeType
6. timeOrigin
7. Methods
8. addEventListener
9. clearMarks
10. clearMeasures
11. clearResourceTimings
12. dispatchEvent
13. getEntries
14. getEntriesByName
15. getEntriesByType
16. mark
17. measure
18. noSuchMethod
19. now
20. removeEventListener
21. setResourceTimingBufferSize
22. toString
23. Operators
24. operator ==

num get timeOrigin native;