Hoe phase may be avoided now. This should help wireless folks, when Hoe extension is big pain. Return 2.2 behaviour. It is both faster and allows to play with sndbuf autotuning. No min-max balancing, but autoslection still sane and allows to work with arbitrary link powers not harming VM and security.
First tests shows it behaves sane.
I do not believe to this fortune. Last makeup is cleaning TCP timers to move timer logic under socket lock. It was useless loss of time both on unidirectional and transaction like connections. The only case, when new scheme is worse, is almost idle keepalive-like session. Well, if it is almost idle, timer will not add significant overhead in any case.