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 - 119: Supported
  5. 120: Supported
  6. 121 - 123: Supported

Edge

  1. 12 - 18: Not supported
  2. 79 - 119: Supported
  3. 120: Supported

Safari

  1. 3.1 - 12: Not supported
  2. 12.1 - 17.0: Partial support
  3. 17.1: Partial support
  4. 17.2 - TP: Partial support

Firefox

  1. 2 - 60: Not supported
  2. 61 - 119: Supported
  3. 120: Supported
  4. 121 - 123: Supported

Opera

  1. 9 - 51: Not supported
  2. 52 - 103: Supported
  3. 104: Supported

IE

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

Chrome for Android

  1. 119: Supported

Safari on iOS

  1. 3.2 - 17.0: Not supported
  2. 17.1: Not supported
  3. 17.2: Not supported

Samsung Internet

  1. 4 - 22: Not supported
  2. 23: Not 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 - 4.4.4: Not supported
  2. 119: Supported

Firefox for Android

  1. 119: 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