A while back, Phoronix published benchmarks for DragonFly 3.0. http://www.phoronix.com/scan.php?page=news_item&px=MTA3MDA
They showed generally good numbers, but the disk test showed a startling 250% DROP in disk speed with Hammer between 2.10 and 3.0. The test is unpacking a certain version of the Linux kernel - pretty simple test. That kind of drop would be driving everyone crazy, but I wanted to put some numbers behind saying "OMG that benchmark for my favorite operating system is wrong and you are mean!" There is bug 2288, which shows a small slowdown, but nothing of this magnitude: http://bugs.dragonflybsd.org/issues/2288 So, I've been running the same test as the Phoronix one, at random time on shiningsilence.com, before and after upgrading it from DragonFly 2.10 to DragonFly 3.0. Here's the command: /bin/rm -rf linux-2.6.32; /usr/bin/time -o notes.txt -a tar xf linux-2.6.32.tar.bz2 Here's the results, averaged: 39.791 - 2.10 real 28.509 - 2.10 user 03.529 - 2.10 sys 44.829 - 3.0 real 26.137 - 3.0 user 04.888 - 3.0 sys There's an ~10ish% increase that's consistent with bug 2288, but nowhere near what the Phoronix test saw. Maybe they forgot to remove the results of unzipping before running the test multiple times? I don't know. Anyway, yes, we do have some sort of slowdown between 2.10 and 3.0, but it's not catastrophic. Here's the graph cause graphs always make me happy: <img src="https://docs.google.com/a/shiningsilence.com/spreadsheet/oimg?key=0ArcmL0I6rCOEdDJWclFNOHJSYmVFLVM3V0Jsa0liaUE&oid=2&zx=u2dxp5zd7kn"; /> And the raw data: on 2.10 36.66 real 30.45 user 3.61 sys 36.69 real 23.96 user 3.02 sys 43.10 real 28.42 user 3.50 sys 42.51 real 29.42 user 3.85 sys 41.16 real 29.84 user 3.64 sys 36.86 real 28.18 user 3.49 sys 45.83 real 24.82 user 2.91 sys 39.05 real 27.60 user 3.57 sys 39.89 real 29.17 user 3.80 sys 37.99 real 30.41 user 3.73 sys 37.94 real 31.01 user 3.89 sys 39.81 real 28.83 user 3.34 sys on 3.0 43.76 real 23.87 user 4.71 sys 43.46 real 24.26 user 4.04 sys 42.38 real 26.27 user 4.72 sys 45.03 real 27.04 user 5.29 sys 46.22 real 27.78 user 5.51 sys 46.14 real 24.87 user 4.63 sys 44.73 real 27.00 user 5.05 sys 45.28 real 26.07 user 4.57 sys 47.03 real 27.22 user 4.84 sys 44.26 real 26.99 user 5.52 sys
