High Resolution Time API

- REC

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()

Chrome

  1. 4 - 19: Not supported
  2. 20 - 23: Supported
  3. 24 - 116: Supported
  4. 117: Supported
  5. 118 - 120: Supported

Edge

  1. 12 - 116: Supported
  2. 117: Supported

Safari

  1. 3.1 - 7.1: Not supported
  2. 8 - 16.5: Supported
  3. 16.6: Supported
  4. 17.0 - TP: Supported

Firefox

  1. 2 - 14: Not supported
  2. 15 - 54: Supported
  3. 55 - 57: Supported
  4. 58 - 59: Supported
  5. 60 - 116: Supported
  6. 117: Supported
  7. 118 - 120: Supported

Opera

  1. 9 - 12.1: Not supported
  2. 15 - 101: Supported
  3. 102: Supported

IE

  1. 5.5 - 9: Not supported
  2. 10: Supported
  3. 11: Supported

Chrome for Android

  1. 117: Supported

Safari on iOS

  1. 3.2 - 7.1: Not supported
  2. 8: Supported
  3. 8.1: Not supported
  4. 9 - 16.6: Supported
  5. 17.0: Supported
  6. 17.1: Supported

Samsung Internet

  1. 4 - 21: Supported
  2. 22: Supported

Opera Mini

  1. all: Not supported

Opera Mobile

  1. 10 - 12.1: Not supported
  2. 73: Supported

UC Browser for Android

  1. 15.5: Supported

Android Browser

  1. 2.1 - 4.3: Not supported
  2. 4.4 - 4.4.4: Supported
  3. 117: Supported

Firefox for Android

  1. 117: Supported

QQ Browser

  1. 13.1: Supported

Baidu Browser

  1. 13.18: Supported

KaiOS Browser

  1. 2.5: Supported
  2. 3: Supported

The timestamp is not actually high-resolution. To mitigate security threats such as Spectre, browsers currently round the result to varying degrees.

Resources:
Demo
HTML5Rocks article
MDN Web Docs - Performance.now
SitePoint article