I find current comparison chart a bit confusing. I think we don’t need all results displayed from comparing benchmark. Maybe only last commit result from benchmark we want to compare with is enough on graph. This could be simply plotted as one line graph and would be much more clear what is being compared.
You can get the feel about differences between benchmarks but it is not that clear which commit results are being compared.
I propose something like this :
This is much simpler in every way.