1. High Resolution Time API

    Method to provide the current time in sub-millisecond resolution and such that it is not subject to system clock skew or adjustments. Called using `performance.now()`

  2. Network Information API

    The Network Information API enables web applications to access information about the network connection in use by the device. Accessed via `navigator.connection`

  3. Resource Timing (basic support)

    Method to help web developers to collect complete timing information related to resources on a document.

  4. User Timing API

    Method to help web developers measure the performance of their applications by giving them access to high precision timestamps.

  5. performance api

  6. performancecontainertiming api

  7. performanceelementtiming api

  8. performanceentry api

  9. performanceentry api: duration

  10. performanceentry api: entrytype

  11. performanceentry api: name

  12. performanceentry api: starttime

  13. performanceentry api: tojson

  14. performanceeventtiming api

  15. performancelongtasktiming api

  16. performancemark api

  17. performancemark api: detail

  18. performancemeasure api

  19. performancemeasure api: detail

  20. performancenavigation api

  21. performanceobserver api

  22. performancepainttiming api

  23. performanceresourcetiming api

  24. performancescripttiming api

  25. performanceservertiming api

  26. performancesoftnavigation api

  27. performancetiming api

  28. performancetiming api: tojson

  29. performance api: clearmarks

  30. performance api: clearmeasures

  31. performance api: eventcounts

  32. performance api: getentries

  33. performance api: mark

  34. performance api: measure

  35. performance api: memory

  36. performance api: navigation

  37. performance api: now

  38. performance api: timeorigin

  39. performance api: timing

  40. performance api: tojson