See the the faq...

We are trying to show the performance of various programming language implementations - so we ask that contributed programs not only give the correct result, but also use the same algorithm to calculate that result.

Doug Bagley used both same way (same algorithm) and same thing (same result) benchmarks - so in many cases the performance differences were simply better algorithms.

After hearing many arguments, it seems to me that we should think of same way (same algorithm) tests as benchmarks, and we should think of same thing (same result) tests as contests.

At present, we are only trying to show benchmarks.