A Nice Improvement Coming For Faster Btrfs Zstd Decompression

A queued Btrfs change removes a redundant copy from the Zstd decompression path by mapping the current page-bounded destination directly into the decompressor. The patch reports 7.8% lower sequential-read time with 4K sectors, 3.6% with 16K sectors, 6.8% with 64K sectors, and about 3% faster random 4K reads.

The change is in the Btrfs for-next branch for the Linux 7.4 cycle; it is not yet a released-kernel feature. Phoronix reported two comments, but its forum reaction text was unavailable during review.