Does SELinux Slow Down Fedora 15?

Moving onto more computational tests, of course, there's no difference.

The modern SELinux implementation appears to have very little overhead.

The Apache web-server was affected the most by SELinux where disabling it had resulted in 11% more transactions per second being handled. With other select workloads pegging the disk drive, SELinux did have a small negative impact, but overall it was not that great. There are other changes that could be made to the file-system settings and other areas of the Linux installation to more dramatically influence the performance one way or the other. In the other tests, SELinux had no visible difference. These results can also be found on OpenBenchmarking.org.