Those plots are confusing - plotting time and standard deviation as two bars next to each other is odd. It would be much better if the plot used error bars, e.g

Those plots are confusing - plotting time and standard deviation as two bars next to each other is odd. It would be much better if the plot used error bars, e.g. like this: https://egret.psychol.cam.ac.uk/statistics/local_copies_of_sources_Cardinal_and_Aitken_ANOVA/errorbars_files/graph1.gif https://egret.psychol.cam.ac.uk/statistics/local_copies_of_s... . Otherwise it's very hard to tell whether the difference between two implementations is just noise or not. And if the numbers are so large, adjust the scale. Don't plot thousands of nanoseconds—plot microseconds! I'm not faulting the author for their plots—making good plots is hard!—but good articles suffer when the data is presented in such ways.