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Compress images using xz instead of gzip (#1018)

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The xz compression allows higher compression rates and higher speeds,
a quick measurement lead to this numbers:
gzip --best: compression 131.11s, decompression 9.797s (299M)
xz -3 (single thread): compression 95.13s, decompression 14.902s (228M)
xz -3 (multi thread): compression 12.146s, decompression 14.902s (228M)
This commit is contained in:
Stefan Agner
2020-11-26 00:29:11 +01:00
committed by GitHub
parent 4be3dee0b4
commit 1a6dcbbf5b
9 changed files with 14 additions and 14 deletions
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6
buildroot-external/scripts/hdd-image.sh
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@@ -312,10 +312,10 @@ function convert_disk_image_virtual() {
}
function convert_disk_image_gz() {
function convert_disk_image_xz() {
local hdd_ext=${1:-img}
local hdd_img="$(hassos_image_name "${hdd_ext}")"
rm -f "${hdd_img}.gz"
gzip --best "${hdd_img}"
rm -f "${hdd_img}.xz"
xz -3 -T0 "${hdd_img}"
}