Can I use
?

Server Timing

- WD

Mechanism for web developers to annotate network requests with server timing information.

Chrome

  1. 4 - 59: Not supported
  2. 60 - 63: Disabled by default
  3. 64: Disabled by default
  4. 65 - 105: Supported
  5. 106: Supported
  6. 107 - 109: Supported

Edge

  1. 12 - 18: Not supported
  2. 79 - 104: Supported
  3. 105: Supported

Safari

  1. 3.1 - 12: Not supported
  2. 12.1 - 15.6: Partial support
  3. 16.0: Partial support
  4. 16.1 - TP: Partial support

Firefox

  1. 2 - 60: Not supported
  2. 61 - 104: Supported
  3. 105: Supported
  4. 106 - 107: Supported

Opera

  1. 9 - 51: Not supported
  2. 52 - 90: Supported
  3. 91: Supported

IE

  1. 5.5 - 10: Not supported
  2. 11: Not supported

Chrome for Android

  1. 105: Supported

Safari on iOS

  1. 3.2 - 15.6: Not supported
  2. 16.0: Not supported
  3. 16.1: Not supported

Samsung Internet

  1. 4 - 17.0: Not supported
  2. 18.0: Not supported

Opera Mini

  1. all: Not supported

Opera Mobile

  1. 10 - 12.1: Not supported
  2. 64: Supported

UC Browser for Android

  1. 13.4: Supported

Android Browser

  1. 2.1 - 4.4.4: Not supported
  2. 105: Supported

Firefox for Android

  1. 104: Supported

QQ Browser

  1. 13.1: Supported

Baidu Browser

  1. 13.18: Supported

KaiOS Browser

  1. 2.5: Not supported
Resources:
Blog post
MDN article on PerformanceServerTiming
Demo