Merged
Conversation
ryantm
requested review from
airportyh and
vlinkz
and removed request for
a team and
airportyh
Why === * The nix modules disk builds too slowly. * Moving the squashfs and tarball steps out of nix should make it faster * We can also speed up things and make the disk smaller with different compression choices What changed === * move squashfs and tarball steps into one script called disk-script that you can run with `nix run -L .#disk-script` or `nix run -L .#disk-script-dev` * run xargs cp in parallel * use lz4 compression for squashfs and 1M block size * use --best --recursive for pigz compression on tarball * add output for the time each stage takes Test plan === * ran it locally ``` xargs copy took 306 seconds mksquashfs took 148 seconds tar took 140 seconds ``` ~10 minutes ``` $ du -h /tmp/tmp.Lj42PAdmKN/disk.sqsh 21G /tmp/tmp.Lj42PAdmKN/disk.sqsh $ du -h /tmp/tmp.Lj42PAdmKN/disk.sqsh.tar.gz 17G /tmp/tmp.Lj42PAdmKN/disk.sqsh.tar.gz ```
ryantm
force-pushed
the
rtm0128adddiskscript
branch
from
bc590ec to
bf47ba8
Compare
vlinkz
approved these changes
Jan 28, 2026
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
2 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Why
What changed
nix run -L .#disk-scriptornix run -L .#disk-script-devTest plan
~10 minutes (note this was with the .#bundle already being built and cached on my local system.)