From 2fcab516c4cae0bc50455abd356f60e576fec5d9 Mon Sep 17 00:00:00 2001 From: Atemu Date: Sun, 10 Jan 2021 10:03:50 +0100 Subject: iso-image: enable XZ compress filter Minimal ISO: 1m21 -> 2m25 625M -> 617M Plasma5 ISO: 2m45 -> 5m18 1.4G -> 1.3G Decompression speed stays about the same. It's just a few seconds for the whole image anyways and, with that kind of speed, you're going to be bottlenecked by IO long before the CPU. --- nixos/modules/installer/cd-dvd/iso-image.nix | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) (limited to 'nixos/modules/installer/cd-dvd/iso-image.nix') diff --git a/nixos/modules/installer/cd-dvd/iso-image.nix b/nixos/modules/installer/cd-dvd/iso-image.nix index 43d20a556f8..1418420afcd 100644 --- a/nixos/modules/installer/cd-dvd/iso-image.nix +++ b/nixos/modules/installer/cd-dvd/iso-image.nix @@ -425,7 +425,12 @@ in }; isoImage.squashfsCompression = mkOption { - default = "xz -Xdict-size 100%"; + default = with pkgs.stdenv.targetPlatform; "xz -Xdict-size 100% " + + lib.optionalString (isx86_32 || isx86_64) "-Xbcj x86" + # Untested but should also reduce size for these platforms + + lib.optionalString (isAarch32 || isAarch64) "-Xbcj arm" + + lib.optionalString (isPowerPC) "-Xbcj powerpc" + + lib.optionalString (isSparc) "-Xbcj sparc"; description = '' Compression settings to use for the squashfs nix store. ''; -- cgit 1.4.1