Looks like you're just graphing the mean and the stdev.  Any reason not to graph the total as well?

Actually, I just realized that the `mean` here is the mean of the total time of running the suite.  I was thinking it was the mean time-per-example.  I think we'll want to graph both.  (And what you have labeled "mean" I was thinking of as the "total" since it's the mean of the entire suite and not one example).  We may need to figure out better terminology for this...