Gnuplot Produced by GNUPLOT 5.4 patchlevel 0 0 10 20 30 40 50 60 70 80 0 0.5 1 1.5 2 2.5 3 3.5 4 Total sample time (ms) Iterations (x 103) Sample Sample Linear regression Linear regression Confidence interval Confidence interval nth_element/pdqselect/10000