Make WordPress Core

Opened 8 months ago

#59119 new defect (bug)

Measure layout stability metrics in performance tests

Reported by: swissspidy's profile swissspidy Owned by:
Milestone: Future Release Priority: normal
Severity: normal Version:
Component: Build/Test Tools Keywords:
Focuses: performance Cc:

Description

This is a follow-up to #58360.

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

Cumulative Layout Shift (CLS) can be measured using libraries like Lighthouse or https://github.com/GoogleChrome/web-vitals.

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