Just read the @zksync  Airbender.

This is a big step forward for accessible, high performance proving guys

Key takeaways:
-> Proving an Eth block in ~35s on one H100 is awesome lol this makes decentralized proving feel much more realistic
 -> It's outperforming other open source RISC-V zkVMs by 4-6x in benchmarks. The jump to 21.8M cycles/sec is wild
 -> Sub second proofs for appchains means lower costs and better UX are coming soon

Excited to see what people build with this. The repo is public for anyone wanting to dive in.