* Add -9 which is the highest compression level. * Use lzma for secondary compression. Decompression speed is largely unaffected as most cycles are consumed by xz for re-compression. Some numbers: clang x86_64 [3.5.0-2.1 to 3.5.0-3] 17.21MiB default (0.73) 15.67MiB -9 (0.67) 13.59MiB -9 -S djw (0.58) 12.01MiB -9 -S lzma (0.51) inkscape x86_64 [0.48.5-3 to 0.48.5-4] 02.69MiB default (0.21) 01.64MiB -9 (0.13) 01.30MiB -9 -S djw (0.10) 01.01MiB -9 -S lzma (0.08) Signed-off-by: Mohammad Alsaleh <CE.Mohammad.AlSaleh@gmail.com> --- scripts/pkgdelta.sh.in | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/scripts/pkgdelta.sh.in b/scripts/pkgdelta.sh.in index be49326..fe63974 100644 --- a/scripts/pkgdelta.sh.in +++ b/scripts/pkgdelta.sh.in @@ -140,7 +140,7 @@ create_xdelta() deltafile=$(dirname "$newfile")/$pkgname-${oldver}_to_${newver}-$arch.delta local ret=0 - xdelta3 -q -f -s "$oldfile" "$newfile" "$deltafile" || ret=$? + xdelta3 -q -f -9 -S lzma -s "$oldfile" "$newfile" "$deltafile" || ret=$? if (( ret )); then error "$(gettext "Delta could not be created.")" return 1 -- 2.2.0