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Evolving the CLS metric we've finalized the change we plan to make to the metric: maximum session window with 1 second gap, capped at 5 seconds.


The lighthouse CLS score is calculated based on the current viewport it is being tested in. For example, if you test your site on a 1366px monitor and then on a 1920px monitor, the scores may be different (depending on your code quality). So if you're seeing a bad CLS score from the collaborative data on the Page Speed Insights tool, or in the Google search ...

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