Browser & Web Performance · Senior · Question 27 of 75

What effect does bfcache eligibility have on field metrics?

1None, bfcache restores aren't real navigations
2It makes CLS worse
✓Correct answer: bfcache restores are near-instant, so improving eligibility can improve LCP and other loading metrics in RUM

Explanation

Back/forward navigations are a significant share of page views. CrUX counts bfcache restores as navigations.

Further reading

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