[Nathanba]

pretty interesting, Origin-Agent-Cluster only exists on Chrome/Edge so far though and it sounds like it is only intended as a browser hint. From the example I don't quite understand though: Why would the non-parallel version already be so laggy if it runs on the mainthread (1 thread, nothing much else happening on the page) versus the iframe-parallel version which also just gets 1 thread right?

[comex]

I think the idea is that part of the page would be rendered outside the iframe and part inside it.

[ashubham]

That initial load lag seems is something non related to this project.