Performance of Ubuntu, Opensolaris and Freebsd in comparison published a comparison of this three operating systems - Ubuntu vs. OpenSolaris vs. FreeBSD Benchmarks:

For some file-system/disk-centric testing we had used Bonnie++ with the sequential create, random read, and random delete modes. In all three of the tests, OpenSolaris 2008.11 was the champion and had trenched its competition.


If simply counting which operating system was in first place most frequently, it would be Ubuntu. Ubuntu 8.10 x86_64 was in first place eight times, OpenSolaris 2008.11 RC2 was in first place seven times, and FreeBSD 7.1 Beta 2 AMD64 was in first just three tests. Depending upon your system usage, one operating system may appear more favorable, like OpenSolaris with the greater disk performance.

I would like some additional benchmarks about networking performance.