Web features explorer - Speculation rules

Speculation rules are hints to the browser to proactively download pages in the background so they appear instantly when the user navigates to them.

Chrome 109 Released on 2023-01-10
Chrome Android 109 Released on 2023-01-10
Edge 109 Released on 2023-01-12
Firefox Not supported Position: neutral (concerns: complexity) Bugs: 1969396 1969838
Firefox for Android Not supported Position: neutral (concerns: complexity) Bugs: 1969396 1969838
Safari Not supported Bugs: 295193
Safari on iOS Not supported Bugs: 295193

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~12.755% of page loads. More data at chromestatus.com.

My company has a web app in which users can create, edit, and save documents. The app's landing page is the documents list, from which users can open their documents in a proprietary editor in a new tab. The editor has many features, so it loads and evaluates several megabytes of assets. Even with request & bytecode caching, loading and evaluating assets is pretty slow. With the Speculation Rules API (specifically prerendering), I can start asset load and evaluation before a user opens their document, and then use the Broadcast Channel API to tell the prerendered page what document to open.
My company has a web app in which users can create, edit, and save documents. The app's landing page is the documents list, from which users can open their documents in a proprietary editor in a new tab. The editor has many features, so it loads and evaluates several megabytes of assets. Even with request & bytecode caching, loading and evaluating assets is pretty slow. With the Speculation Rules API (specifically prerendering), I can start asset load and evaluation before a user opens their document, and then use the Broadcast Channel API to tell the prerendered page what document to open. [see original comment]