INP metric related question

[Naresh D]

Hello Web Vitals Team,

Could you clarify what is considered the “next paint” for a link click that opens a new tab? In this scenario, does INP measure the time until the current page produces its next visible frame, or does it include the browser time required to open and render the new tab? We are seeing noticeable latency when a new tab is opened and want to understand whether that delay is part of the INP interaction on the originating page by design.

I also reviewed the INP changelog, and it seems that in some cases opening a new tab can end the interaction with 0 presentation delay; however, from our attribution data, we are still seeing very high presentation delays. Could you help explain why that might still happen even on the latest Chrome browser after the fix  Chrome Speed - Interaction to Next Paint Changes in Chrome 111  ? 

I also have two specific scenarios:

1. using Anchor elements with target="_blank".
2. using window.open() triggered via JavaScript.

Additionally, could you clarify the role of rel="noopener" in relation to high INP values? From attribution data, we are seeing high presentation delays, and I want to understand whether noopener has any impact on INP measurement or if it is unrelated.

If the new-tab behavior is included in INP, is there any supported way to exclude such link clicks from INP calculation?

Awaiting your response.

Thanks,

Naresh

[Barry Pollard]

Hi Naresh,

Can you narrow this down to any particular browser and version? As you say we had an issue with this a logn time ago and did fit it. But some very old devices (or devices with embedded browsers?) may still be experiencing the old issue.

rel=noopener should have no impact on INP, but if you casn show that is not the case in Chrome then we'd love to have a reproducible example at crbug.com/new.

Thanks,

Barry

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