Intent to Experiment: Prefetch activation beacon

[Jiacheng Guo]

Contact emails

g...@google.com

Explainer

https://github.com/explainers-by-googlers/prefetch-activation-beacon

Specification

https://github.com/explainers-by-googlers/prefetch-activation-beacon

Summary

The on-prefetch-activation HTTP response header enables servers to specify a telemetry endpoint that the browser notifies when a prefetched resource is used for navigation. Developers gain a reliable signal to measure the precision and performance impact of their prefetch strategies.

Blink component

Blink>Loader>Preload

Web Feature ID

Missing feature

TAG review

No information provided

TAG review status

Pending

Goals for experimentation

We are going to start origin trial for the prefetch activation beacon to evaluate whether it can reliably report all the user navigation when the page is prefetched. We will compare the DAU and the query count with a group not using the API and reports activation via javascript.

Origin Trial documentation link

https://github.com/explainers-by-googlers/prefetch-activation-beacon

Risks

Interoperability and Compatibility

No information provided

Gecko: No signal

WebKit: No signal

Web developers: No signals

Other signals:

WebView application risks

Does this intent deprecate or change behavior of existing APIs, such that it has potentially high risk for Android WebView-based applications?

No

Ongoing technical constraints

None

Debuggability

Basic support, the activation beacon request will be shown in the devtools network panel.

Will this feature be supported on all six Blink platforms (Windows, Mac, Linux, ChromeOS, Android, and Android WebView)?

Yes

Is this feature fully tested by web-platform-tests?

Yes

Flag name on about://flags

prefetch-activation-beacon

Finch feature name

PrefetchActivationBeacon

Non-finch justification

No information provided

Requires code in //chrome?

False

Tracking bug

https://b.corp.google.com/issues/499814382

Launch bug

https://launch.corp.google.com/launch/4468679

Estimated milestones

Origin trial desktop first	151
Origin trial desktop last	155
Origin trial Android first	151
Origin trial Android last	155
Origin trial WebView first	151
Origin trial WebView last	156

Link to entry on the Chrome Platform Status

https://chromestatus.com/feature/5118934710878208?gate=5919970639872000

Links to previous Intent discussions

Intent to Prototype: https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CAJQw1NzrnJBU7pmpz7bfxK2G7cWUcJsaU9ekFHh3XKFUyzzrwg%40mail.gmail.com

This intent message was generated by Chrome Platform Status.