Official statement
FID is hard to replicate in a testing environment because it heavily depends on actual user metrics. An FID under 100 milliseconds should be seen as successful. Low-end mobile devices are particularly sensitive to FID issues.
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Official statement from
(4 years ago)
⚠ A more recent statement exists on this topic
Is Google really replacing First Input Delay with Interaction to Next Paint in C...
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TL;DR
FID relies on real user metrics, which are tough to simulate in tests. A good FID is under 100ms, with low-end mobile devices requiring special attention.
❓ Frequently Asked Questions
Pourquoi le FID est-il important pour le SEO?
Le FID affecte l'expérience utilisateur et donc, potentiellement, le classement SEO.
Quels outils utiliser pour mesurer le FID?
Google PageSpeed Insights et d'autres outils basés sur les Core Web Vitals.
Quelle est la valeur cible pour un bon FID?
Un bon First Input Delay doit être inférieur à 100 millisecondes.
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