1. Dart
2. dart:html
3. Performance
4. timing property

##### Performance class

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

description

# timing property Null safety

PerformanceTiming timing

## Implementation

    PerformanceTiming get timing native;