Starting to focus more on performance and crank through performance issues - this release fixes all the ones I've seen concrete data on
cycle detector/SIX locks improvements - these fix most of the "srcu lock held too long" warnings we've been seeing, and make performance under heavy contention much more robust
btree write buffer multithreading: after the journal pipelining improvements that landed recently, this was the next big bottleneck on the really big systems, and it's fixed thoroughly now
btree node merge attempts thrashing the btree cache are fixed, and 3:2 btree node merging and other improvements are coming in .3
Full changelog - https://evilpiepirate.org/git/bcachefs-tools.git/tree/Changelog.mdwn
So now, if you've got a workload where we're slower than btrfs/zfs, let me know :)