Add a simple script to show advanced statistics

scripts/advanced_statistics.py

@@ -0,0 +1,34 @@
+#!/usr/bin/python
+
+import argparse
+import json
+import numpy as np
+
+parser = argparse.ArgumentParser()
+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]
+
+for command, ts in zip(commands, times):
+    p05 = np.percentile(ts, 5)
+    p25 = np.percentile(ts, 25)
+    p75 = np.percentile(ts, 75)
+    p95 = np.percentile(ts, 95)
+
+    iqr = p75 - p25
+
+    print("Command '{}'".format(command))
+    print("  mean:   {:8.3f} s".format(np.mean(ts)))
+    print("  stddev: {:8.3f} s".format(np.std(ts, ddof=1)))
+    print("  median: {:8.3f} s".format(np.median(ts)))
+    print()
+    print("  percentiles:")
+    print("     P_05 .. P_95:    {:.3f} s .. {:.3f} s".format(p05, p95))
+    print("     P_25 .. P_75:    {:.3f} s .. {:.3f} s  "
+          "(IQR = {:.3f} s)".format(p25, p75, iqr))
+    print()