Interaction to Next Paint

Click a button to render content. A longer delay blocks the main thread and worsens INP — the time from your click until the browser can paint the update.

Last interaction

Processing + paint
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Input delay
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Configured delay
0 s
INP (p75 estimate)
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Metrics use the Event Timing API when supported (Chrome, Edge). Try delays of 0 s vs 1–2 s and watch INP climb.