INP, input delay too long without any logic

Đào Hùng

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May 14, 2025, 3:42:35 PM May 14

to web-vitals-feedback

Hi, I am facing a puzzling issue
I am not actually testing on mobile, but I am using chrome mobile mode for testing
I turned on mobile mode and tried clicking anywhere on the web page, clicking on links, on text, all of which produce 2xx ms INP (~200ms is for input delay)
When I tried to use performance tab to investigate, there is no processing running during the delay

I am a newbie in web vitals. If there is any silly mistake, please point it out to me, I would be very grateful

(To be honest, I don't even know how to investigate errors in the performance tab)

This is the trace log https://drive.google.com/file/d/1GqYhOqWo-GUM9qyIlv8NGyCcvPtgrT4J/view?usp=sharing

Barry Pollard

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May 14, 2025, 3:47:16 PM May 14

to Đào Hùng, web-vitals-feedback

It's not you, it's us!

It seems to only happen in Mobile Emulation mode:

Follow this issue for updates: https://issues.chromium.org/issues/409577163

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Michal Mocny

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May 14, 2025, 3:49:08 PM May 14

to Barry Pollard, Đào Hùng, web-vitals-feedback

I think that if you refresh the page after enabling emulation mode, it often (but not always) goes away.

To view this discussion visit https://groups.google.com/d/msgid/web-vitals-feedback/CAH6JyLTg%3DCfpUbRWv9Tn-71ebCYWXc%3DSS7dsZ9iCk-F_KJimSg%40mail.gmail.com .

Đào Hùng

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May 14, 2025, 3:56:52 PM May 14

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thank you so much, I see, I will try with small screen and leave out emulator mobile mode right now

Vào lúc 02:49:08 UTC+7 ngày Thứ Năm, 15 tháng 5, 2025, mmo...@google.com đã viết:

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