For comparing multiple implementations of a single benchmark in a single language, this sort of data would be interesting as a 2D plot, to see how many lines it takes to improve performance by how much. But for cross-language benchmarking this seems somewhat confounding, as the richness of standard libraries varies between languages (and counting the lines of external dependencies sounds extremely annoying, not only because you have to decide whether to include standard libraries (including libc), you also need to find a way not to penalize those for having many lines devoted to tests).