On Fri, Feb 19, 2021 at 16:45:02 -0300, Giancarlo Razzolini via arch-general wrote: > If you're using lz4 now, you might want to try zstd. It's faster to > generate images now. I benchmarked it on my mkinitcpio image, and zstd with mkinitcpio's default compression level 19 (standard COMPRESSION_OPTIONS for zstd) is several orders of magnitude slower than lz4, only to gain ~30% extra compression. It is slower to decompress too, but less noticeably so. $ time lz4 -l initramfs-linux.img Compressed filename will be : initramfs-linux.img.lz4 Compressed 11714560 bytes into 6595816 bytes ==> 56.30% real 0m0.065s user 0m0.043s sys 0m0.019s $ time zstd -19 -T0 initramfs-linux.img initramfs-linux.img : 33.76% (11714560 => 3954632 bytes, initramfs-linux.img.zst) real 0m8.173s user 0m6.167s sys 0m0.187s $ rm initramfs-linux.img.zst $ time zstd -T0 initramfs-linux.img initramfs-linux.img : 40.92% (11714560 => 4793496 bytes, initramfs-linux.img.zst) real 0m0.127s user 0m0.130s sys 0m0.027s Sticking to lz4 here. Geert
