Waku PPR?

[dai-shi]

According to https://sunilpai.dev/posts/ppr-for-everyone/ by @threepointone, it seems technically possible to implement PPR in Waku.

We could start experimenting it, but to finalize it, the followings are blocking:

• https://react.dev/reference/react-dom/static/prerender should describe about postponed
• unstable_postpone should become postpone, or at least noted it's ready for frameworks
• resumeToReadableStream should be provided from react-dom/server.edge

Meanwhile, I'll focus on #816 which has a different trade-off.