[wp-trac] [WordPress Trac] #59120: Measure interactivity metrics in performance tests

[WordPress Trac]

#59120: Measure interactivity metrics in performance tests
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 Reporter:  swissspidy        |      Owner:  (none)
     Type:  defect (bug)      |     Status:  new
 Priority:  normal            |  Milestone:  Future Release
Component:  Build/Test Tools  |    Version:
 Severity:  normal            |   Keywords:
  Focuses:  performance       |
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 This is a follow-up to #58360.

 While we have some good load time metrics so far, we don't measure
 interactivity metrics yet.

 We're particularly looking at these 3 metrics:

 * [https://web.dev/tbt/ Total Blocking Time] (TBT)
 * [https://web.dev/fid/ First Input Delay] (FID)
 * [https://web.dev/inp/ Interaction to Next Paint] (INP)

 They can be measured using libraries like Lighthouse or
 https://github.com/GoogleChrome/web-vitals.

 Interactivity metrics require some sort of interaction during the test, so
 we need to figure out specifics.

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Ticket URL: <https://core.trac.wordpress.org/ticket/59120>
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