parallel bzip2 with lbzip2? 3.2s VS 21.4s
Hello,
does anyone know how to use parallel bzip2 with gimp (lbzip2)?
It's lots quicker on my 4 core 2013 Macbook pro. Even quicker than zstd (to be fair that only uses one core).
Compression 6.5 x faster
$ time lbzip2 -9 purple_1.xcf
real 0m3.294s
user 0m24.601s
sys 0m0.237s
$ time zstd -9 purple_1.xcf
purple_1.xcf : 55.36% (258600069 => 143163605 bytes, purple_1.xcf.zst)
real 0m21.458s
user 0m21.343s
sys 0m0.251s
$ time bzip2 -9 purple_1.xcf
real 0m20.948s
user 0m20.688s
sys 0m0.195s
$ ls -la
-rw-r--r--+ 1 rene staff 258600069 17 Dec 15:19 purple_1.xcf
-rw-r--r--+ 1 rene staff 119720372 17 Dec 15:17 purple_1.xcf.bz2
-rw-r--r--+ 1 rene staff 119843132 17 Dec 15:16 purple_1.xcf.bz2.lbzip2
-rw-r--r--+ 1 rene staff 143163605 17 Dec 15:12 purple_1.xcf.zst
Decompression 7.5 x faster
$ time lbzip2 -d purple_1.xcf.bz2
real 0m1.705s
user 0m12.335s
sys 0m0.256s
$ time bzip2 -d purple_1.xcf.bz2
real 0m12.783s
user 0m12.476s
sys 0m0.216s