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We use xz compression for initramfs since ages™, as it provides a small initramfs file:
# time update-initramfs -k all -u
[...]
real 0m30.415s
user 2m40.279s
sys 0m3.720s
# ls -lah /boot/initrd.img-*
-rw-r--r-- 1 root root 38M Jul 4 17:13 /boot/initrd.img-5.18.0-2-amd64
# file /boot/initrd.img-*
/boot/initrd.img-5.18.0-2-amd64: XZ compressed data, checksum CRC32
But initramfs-tools uses zstd as default compression for initramfs starting with v0.141 (see https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=976054), and while disk usage increases, build time gets reduced quite significantly:
# time update-initramfs -k all -u
[...]
real 0m13.089s
user 0m14.102s
sys 0m3.094s
# ls -lah /boot/initrd.img-*
-rw-r--r-- 1 root root 47M Jul 4 17:12 /boot/initrd.img-5.18.0-2-amd64
# file /boot/initrd.img-*
/boot/initrd.img-5.18.0-2-amd64: Zstandard compressed data (v0.8+), Dictionary ID: None
We should figure out run-time issues (memory usage, time for uncompression), and if zstd performs better than xz, it might be worth switching to it as our new default?
The text was updated successfully, but these errors were encountered:
We use
xz
compression for initramfs since ages™, as it provides a small initramfs file:But initramfs-tools uses zstd as default compression for initramfs starting with v0.141 (see https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=976054), and while disk usage increases, build time gets reduced quite significantly:
We should figure out run-time issues (memory usage, time for uncompression), and if zstd performs better than xz, it might be worth switching to it as our new default?
The text was updated successfully, but these errors were encountered: