Gnuplot Produced by GNUPLOT 5.4 patchlevel 0 0 5 10 15 20 1 1.5 2 2.5 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 Iterations Density (a.u.) Average time (ms) PDF PDF Mean Mean "Clean" sample "Clean" sample Mild outliers Mild outliers gnuplot_plot_5 gnuplot_plot_6 gnuplot_plot_7 gnuplot_plot_8 nth_element/pdqselect/1000000