Maybe it's just me, but the log scale for the relative program times is pretty confusing. While it probably makes the improvement more obvious, it doesn't help me understand the actual magnitude of improvement visually, without having to look at the scale and figure out the actual numbers.
I think what would have worked better is normalizing the interpreted to 1.0 and then having the pqR results set against that. That'd make the graph far less noisy and much easier to interpret for making the case of pqR being faster. Right now there's much more information there than needs to be for that with every different version of both being represented.
Maybe it's just me, but the log scale for the relative program times is pretty confusing. While it probably makes the improvement more obvious, it doesn't help me understand the actual magnitude of improvement visually, without having to look at the scale and figure out the actual numbers.