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Btrfs may have compression on by default so take it with a grain of salt
Doesn't Bcachefs, a well?
Neither do according to their respective docs.
Personally though I would've preferred an updated* test with more realistic hardware and zstd compression enabled cause this tested configuration is pretty rare in the real world.
* Their last btrfs compression benchmark was on Linux 4.11 in 2017 it seems, on a 120 GB Sata SSD.
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Looks like for speed EXT4 still reigns, but that misses the point of ZFS, Btrfs, Bcachefs AND F2FS, which are all COW filesystems and not intended to outperform journaling filesystems in speed.