On 2025/1/17 15:46, Gao Xiang wrote:
Difference from the previous Yiyan's version [1], it just uses
a tmpfile to keep all decompressed data for fragments.
Dataset: linux 5.4.140
mkfs.erofs command line:
mkfs.erofs -zlzma -C131072 -T0 -Eall-fragments,fragdedupe=inode foo.erofs
<dir>
Test command line:
hyperfine -p "echo 3 > /proc/sys/vm/drop_caches; sleep 1" "fsck/fsck.erofs
--extract foo.erofs"
Vanilla:
Time (mean ± σ): 362.309 s ± 0.406 s [User: 360.298 s, System: 0.956
s]
After:
Time (mean ± σ): 20.880 s ± 0.026 s [User: 19.751 s, System: 1.058 s]
An in-memory LRU cache could also be implemented later to
meet different needs.
[1] https://lore.kernel.org/r/[email protected]
Cc: Li Yiyan <[email protected]>
Signed-off-by: Gao Xiang <[email protected]>
