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 - 112: Supported
  5. 113: Supported
  6. 114 - 116: Supported

Edge

  1. 12 - 18: Not supported
  2. 79 - 112: Supported
  3. 113: Supported

Safari

  1. 3.1 - 12: Not supported
  2. 12.1 - 16.4: Partial support
  3. 16.5: Partial support
  4. 16.6 - TP: Partial support

Firefox

  1. 2 - 60: Not supported
  2. 61 - 112: Supported
  3. 113: Supported
  4. 114 - 115: Supported

Opera

  1. 9 - 51: Not supported
  2. 52 - 98: Supported
  3. 99: Supported

IE

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

Chrome for Android

  1. 113: Supported

Safari on iOS

  1. 3.2 - 16.4: Not supported
  2. 16.5: Not supported

Samsung Internet

  1. 4 - 20: Not supported
  2. 21: Not supported

Opera Mini

  1. all: Not supported

Opera Mobile

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

UC Browser for Android

  1. 13.4: Supported

Android Browser

  1. 2.1 - 4.4.4: Not supported
  2. 113: Supported

Firefox for Android

  1. 113: Supported

QQ Browser

  1. 13.1: Supported

Baidu Browser

  1. 13.18: Supported

KaiOS Browser

  1. 2.5: Not supported
  2. 3: Supported
Resources:
Blog post
MDN article on PerformanceServerTiming
Demo