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| author | Eelco Dolstra <eelco.dolstra@logicblox.com> | 2012-06-29T18·26-0400 |
|---|---|---|
| committer | Eelco Dolstra <eelco.dolstra@logicblox.com> | 2012-06-29T19·24-0400 |
| commit | 4911a10a4e51102a21a5d123a852c75d2ec92dbc (patch) | |
| tree | 6e02ca6d92cc037efc89801960f4997a7d54e168 /substitute.mk | |
| parent | 49cd7387ad6546571ca31a41f208091b482defaa (diff) | |
Use XZ compression in binary caches
XZ compresses significantly better than bzip2. Here are the compression ratios and execution times (using 4 cores in parallel) on my /var/run/current-system (3.1 GiB): bzip2: total compressed size 849.56 MiB, 30.8% [2m08] xz -6: total compressed size 641.84 MiB, 23.4% [6m53] xz -7: total compressed size 621.82 MiB, 22.6% [7m19] xz -8: total compressed size 599.33 MiB, 21.8% [7m18] xz -9: total compressed size 588.18 MiB, 21.4% [7m40] Note that compression takes much longer. More importantly, however, decompression is much faster: bzip2: 1m47.274s xz -6: 0m55.446s xz -7: 0m54.119s xz -8: 0m52.388s xz -9: 0m51.842s The only downside to using -9 is that decompression takes a fair amount (~65 MB) of memory.
Diffstat (limited to 'substitute.mk')
| -rw-r--r-- | substitute.mk | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/substitute.mk b/substitute.mk index eb489c97a509..77c5afc28117 100644 --- a/substitute.mk +++ b/substitute.mk @@ -16,6 +16,7 @@ -e "s^@shell\@^$(bash)^g" \ -e "s^@curl\@^$(curl)^g" \ -e "s^@bzip2\@^$(bzip2)^g" \ + -e "s^@xz\@^$(xz)^g" \ -e "s^@perl\@^$(perl)^g" \ -e "s^@perlFlags\@^$(perlFlags)^g" \ -e "s^@coreutils\@^$(coreutils)^g" \ |