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Marcus Holland-Moritz 2021-03-05 22:44:35 +01:00
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@ -792,21 +792,18 @@ So here's a comparison of the extraction speed:
$ time sudo dwarfsextract -i raspbian-9.dwarfs -o out2 $ time sudo dwarfsextract -i raspbian-9.dwarfs -o out2
real 0m12.986s real 0m3.825s
user 0m11.711s user 0m13.234s
sys 0m1.350s sys 0m1.382s
Not much of a difference really. So `dwarfsextract` is almost 4 times faster thanks to using multiple
worker threads for decompression.
One nice feature of `dwarfsextract` is that it allows you to directly Another nice feature of `dwarfsextract` is that it allows you to directly
output data in an archive format, so you could create a tarball from output data in an archive format, so you could create a tarball from
your image without extracting the files to disk: your image without extracting the files to disk:
$ time dwarfsextract -i raspbian-9.dwarfs -f ustar | xz -9 -T0 >raspbian2.tar.xz $ dwarfsextract -i raspbian-9.dwarfs -f ustar | xz -9 -T0 >raspbian2.tar.xz
real 1m28.961s
user 6m13.924s
sys 0m2.567s
This has the interesting side-effect that the resulting tarball will This has the interesting side-effect that the resulting tarball will
likely be smaller than the one built straight from the directory: likely be smaller than the one built straight from the directory: