For the C-Ray Phoronix CPU multi-threaded benchmark favorite, Fedora 17 and Arch Linux were the fastest. This is not a surprise since GCC 4.7 does extremely well for this workload compared to earlier GNU Compiler Collection releases, but it is interesting to see Slackware 14.0 Beta perform so poorly.
The Slackware 14.0 Beta performance was also oddly disappointing when it came to the OpenSSL benchmark as the four other Linux distributions were much faster.
That rounds out the cross-distribution testing for now. As you can see from the results, depending upon the workload the results can very greatly. Aside from the raw performance, the features, reliability, maintenance period, and other factors also very greatly for production Linux distributions.
Find more open-source Linux benchmarks at OpenBenchmarking.org.