dealing with two way latency

Probably we can do out of order block production to decrease the latency to half or rotate the current block producer automatically.

No files, tests, or entry points are named. Start by locating block production and measuring the current two-way latency, then evaluate whether out-of-order production or automatic producer rotation is viable. Done requires an agreed design and evidence that the approach reduces latency without compromising block ordering or safety.

Written by the indexing model from the issue text.