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 - 136: Supported
  5. ✅ 137: Supported
  6. ✅ 138 - 140: Supported

Edge

  1. ❌ 12 - 18: Not supported
  2. ✅ 79 - 136: Supported
  3. ✅ 137: Supported

Safari

  1. ❌ 3.1 - 12: Not supported
  2. ◐ 12.1 - 16.3: Partial support
  3. ✅ 16.4 - 18.4: Supported
  4. ✅ 18.5: Supported
  5. ✅ 26.0 - TP: Supported

Firefox

  1. ❌ 2 - 60: Not supported
  2. ✅ 61 - 138: Supported
  3. ✅ 139: Supported
  4. ✅ 140 - 142: Supported

Opera

  1. ❌ 9 - 51: Not supported
  2. ✅ 52 - 116: Supported
  3. ✅ 117: Supported

IE

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

Chrome for Android

  1. ✅ 137: Supported

Safari on iOS

  1. ❌ 3.2 - 16.3: Not supported
  2. ✅ 16.4 - 18.4: Supported
  3. ✅ 18.5: Supported
  4. ✅ 26.0: Supported

Samsung Internet

  1. ❌ 4 - 27: Not supported
  2. ❌ 28: Not supported

Opera Mini

  1. ❌ all: Not supported

Opera Mobile

  1. ❌ 10 - 12.1: Not supported
  2. ✅ 80: Supported

UC Browser for Android

  1. ✅ 15.5: Supported

Android Browser

  1. ❌ 2.1 - 4.4.4: Not supported
  2. ✅ 137: Supported

Firefox for Android

  1. ✅ 139: Supported

QQ Browser

  1. ✅ 14.9: Supported

Baidu Browser

  1. ✅ 13.52: Supported

KaiOS Browser

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