Among the pull requests merged today on this first day of the Linux 7.0 merge window are the many Btrfs file-system feature updates.
David Sterba sent in the Btrfs feature pull in advance of the Linux 6.19 stable release and thus among the early merges for kicking off the Linux 7.0 cycle. There aren’t any noted performance optimizations specifically this cycle but a lot of other feature work some of which may help performance like enabling direct I/O for larger block sizes when greater than the kernel’s page size.
I use it because it has native compressio and also an entire incremental backup tool built in (btrfs send/receive can throw snapshots of a filesystem across networks)
Although my actual daily driver is FreeBSD with ZFS