[logback-dev] benchmarking extension to junit?

Hello all, Logback contains a small number of time-sensitive tests. The time needed to execute these tests depend on the capabilities of the host CPU. For example, if on my machine a test executes in 1 millisecond, I would expect it to finish in say 1*10 milliseconds on most machine -- allowing for 10 fold variation. Does anyone know of a junit extension which can help me normalize the coefficient, 10 in the previous example, so that it adapts to the speed of the host CPU? There is also the problem of the JIT compiler... Any recommendations on the subject? -- Ceki Gülcü