Support signed exchange subresource prefetching and loading by extending the HTTP link header.
Link to “Intent to Implement” blink-dev discussion
Goals for experimentation
The main goal is to measure the performance benefit of alternative subresource signed exchange prefetch. And also, this feature requires participation of both content publishers and distributors. So we would like to know whether this API design and mechanism works or not.
M78 - M82(tentative)
Any risks when the experiment finishes?
After the OriginTrial expires, Chrome will not prefetch the alternative subresource signed exchanges, but will prefetch the original subresources written in inner link header.
Ongoing technical constraints
DevTools shows the information about signed exchange subresource prefetching and loading in the Network tab.
Will this feature be supported on all five Blink platforms supported by Origin Trials (Windows, Mac, Linux, Chrome OS, and Android)?
Link to entry on the feature dashboard
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