The digest came back in a mess. Here is a image of the Excel sheet.
Thanks, J.R. On Tue, Jul 31, 2018 at 4:38 PM, J.R. Heisey <j...@heisey.org> wrote: > Hi Joerg, > > I ran some tests and I'm seeing anywhere from 9.38% to 33 % performance > improvement for various activities. > I'm calculating the percentage based to the best test run for each > activity between tar and star. > The time durations are in mm:ss format. > The computer I was using may have automated processes startup periodically > so I discount the slow running outliers. > > Is this the performance improvement that you would expect with star? > I hope the formatting holds. :) > > *create* > > *Percent* > > *compress bzip2* > > *Percent* > > *compress pbzip2* > > *Percent* > > *decompress bzip2* > > *Percent* > > *decompress pbzip2* > > *Percent* > > tar > > 1:06 > > 2:24 > > 1:31 > > 1:14 > > 0:56 > > 1:05 > > 2:28 > > 2:10 > > 1:04 > > 0:56 > > 1:15 > > 2:20 > > 1:35 > > 1:10 > > 0:58 > > 1:34 > > star > > 2:10 > > 4:24 > > 1:15 > > 0:58 > > 0:46 > > 1:11 > > 2:08 > > 1:30 > > 2:24 > > 0:51 > > 0:43 > > 2:04 > > 1:32 > > 2:29 > > 0:52 > > 1:01 > > using minimums > > 33.85% > > 11.43% > > 17.58% > > 9.38% > > 17.86% > > time star -xj f=testdata-7.13.0-1.pb.star.gz -C ./sources > > time star -compress-program pbzip2 -x f=testdata-7.13.0-1.pb.star.gz -C > ./sources > > time star -cz f=./testdata-7.13.0-1.star.gz -C > ../util-build/testdata-7.13.0-1/sources . > > time star -compress-program pbzip2 -c f=./testdata-7.13.0-1.pb.star.gz -C > ../util-build/testdata-7.13.0-1/sources . > > time star -c f=./testdata-7.13.0-1.star.gz -C > ../util-build/testdata-7.13.0-1/sources . > > time tar -xzf ./testdata-7.13.0-1.tar.gz . > > time tar --use-compress-program pbzip2 -xf ./testdata-7.13.0-1.pbzip2.tar.gz > . > > time tar -czf ./testdata-7.13.0-1.pb.2.tar.gz -C > ../util-build/testdata-7.13.0-1 ./sources/ > > time tar --use-compress-program pbzip2 -cf ./testdata-7.13.0-1.pb.2.tar.gz > -C ../util-build/testdata-7.13.0-1 ./sources/ > > time tar -cf ./testdata-7.13.0-1.tar -C ../util-build/testdata-7.13.0-1 > ./sources/ > > > > > Thanks, > J.R. > > > On Tue, Jul 31, 2018 at 3:23 AM, Joerg Schilling <Joerg.Schilling@fokus. > fraunhofer.de> wrote: > >> "J.R. Heisey" <j...@heisey.org> wrote: >> >> > Greetings, >> > >> > I was trying to make some processes faster which use tar a bit on large >> archives. >> > >> > I was able to use the command line options --use-compress-program >> pbzip2 and that helped a lot. >> > >> > I was wondering if anyone has experimented using pthreads in the tar >> implementation. I don't see any references in version 1.30 of the source or >> readme I downloaded. Anyone discussed a strategy for using pthreads in >> previous postings? >> >> Star forks and runs two processes since approx. 30 years. >> >> The first process is for the filesystem I/O and the second process is for >> the >> archive I/O. between both, there is a ring buffer with configurable size >> that >> decouples both tasks. This helps to make star very fast. >> >> Implementing something like this in a TAR implementation that does not >> yet have >> support for it is highly complex. >> >> Jörg >> >> -- >> EMail:jo...@schily.net (home) Jörg Schilling D-13353 >> Berlin >> joerg.schill...@fokus.fraunhofer.de (work) Blog: >> http://schily.blogspot.com/ >> URL: http://cdrecord.org/private/ http://sf.net/projects/schilyt >> ools/files/' >> > >
