Speculation Rules is a flexible syntax for defining what outgoing links are eligible to be prepared speculatively before navigation. It enables access to additional enhancements, such as use of a private prefetch proxy, where applicable.
Participants in this trial can use this syntax to request prefetching of links they expect the user is likely to visit next.
This is a request to extend the previous experiment, with the same limitations. We would like to extend the experiment for milestones M95 to M97 (inclusive), in order to continue to gather data as a partner makes improvements to their integration and to shave some of the rough edges off the implementation.
Gecko: No signal
WebKit: No signal
Web developers: Past success with <link rel=prefetch> and libraries like QuickLink, and discussion with some partners suggests interest in this space.
To gather feedback about the convenience of the Speculation Rules syntax, and to gather data about performance improvements for navigations that are prefetched, directly and via a private prefetch proxy (subject to the limitations mentioned above).
No significant technical constraints anticipated.
Chrome for Android (non-WebView) only, at present.
Eventually other platforms will be supported.
Not yet, but we have plans to.
The origin trial feature name will continue to be SpeculationRulesPrefetch.
Intent to prototype: https://groups.google.com/a/chromium.org/g/blink-dev/c/1q7Fp3zpjgQIntent to experiment: https://groups.google.com/a/chromium.org/g/blink-dev/c/Cw-hOjT47qI/m/CY7qVZP5AQAJ
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