Add a script to plot histograms

scripts/plot_whisker.py

@@ -0,0 +1,28 @@
+#!/usr/bin/python
+
+"""This program shows `hyperfine` benchmark results as a box and whisker plot.
+
+Quoting from the matplotlib documentation:
+    The box extends from the lower to upper quartile values of the data, with
+    a line at the median. The whiskers extend from the box to show the range
+    of the data. Flier points are those past the end of the whiskers.
+"""
+
+import argparse
+import json
+import matplotlib.pyplot as plt
+
+parser = argparse.ArgumentParser(description=__doc__)
+parser.add_argument("file", help="JSON file with benchmark results")
+args = parser.parse_args()
+
+with open(args.file) as f:
+    results = json.load(f)["results"]
+
+commands = [b["command"] for b in results]
+times = [b["times"] for b in results]
+
+plt.boxplot(times, labels=commands)
+plt.ylabel("Time [s]")
+plt.ylim(0, None)
+plt.show()