"Something I've been promising for a couple of months has been a comparison of Linux kernels 2.6 and 2.4. The 2.6 series has been available for awhile now but the development has been going at a very rapid pace. It seemed everytime I'd be half-way through my benchmarks, a new version would be released. In a desire to stay as current as possible, I held off until now. We'll be taking a look at versions 2.6.4 and 2.4.25 in a variety of benchmarks; both server and workstation-oriented" to see the result click here