Last updated 3 July 2016.
We have graphed the performance of several implementations of the R7RS or R6RS on a set of R7RS/R6RS benchmarks collected by Will Clinger. These benchmarks include improved versions of most Gambit benchmarks (collected by Marc Feeley). The R6RS benchmarks also include new benchmarks that test some of the more important features that were introduced by the R6RS.
Please keep in mind that the results of benchmarking should not be taken too seriously.