On Friday 20 March 2009 17:55:49 RW wrote: > On Sat, 21 Mar 2009 01:53:16 +0200 > > Ghirai <ghi...@ghirai.com> wrote: > > The shareware WinRAR on windows seems to be better implemented (?), as > > it uses both cores to the fullest, and as such the time needed to > > extract stuff is a lot shorter. > > IIRC the unix version is portable C, but winrar has a lot of CPU > specific optimizations.
Among which, being single threaded on unix: % ldd /usr/local/bin/unrar /usr/local/bin/unrar: libstdc++.so.6 => /usr/lib/libstdc++.so.6 (0x280ad000) libm.so.5 => /lib/libm.so.5 (0x281a1000) libgcc_s.so.1 => /lib/libgcc_s.so.1 (0x281bb000) libc.so.7 => /lib/libc.so.7 (0x281c6000) Since disk can read faster then the decompression, a threadpool would be able to use both CPU's for decompressing and speed things up. At least in theory, but certainly on large files with SATA disks. I believe 7z uses bigger buffers, which would explain the marginal difference in runtime. -- Mel _______________________________________________ email@example.com mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"