testing/gtest/bench.py

   1 #!/usr/bin/env python3
   2
   3 import json
   4 import statistics
   5 import subprocess
   6 import sys
   7
   8 proc = subprocess.Popen(["./mach", "gtest", sys.argv[1]], stdout=subprocess.PIPE)
   9 for line in proc.stdout:
  10     if line.startswith(b"PERFHERDER_DATA:"):
  11         data = json.loads(line[len("PERFHERDER_DATA:") :].decode("utf8"))
  12         for suite in data["suites"]:
  13             for subtest in suite["subtests"]:
  14                 # pylint --py3k W1619
  15                 print(
  16                     "%4d.%03d ± %6s ms    %s.%s"
  17                     % (
  18                         subtest["value"] / 1000.0,
  19                         subtest["value"] % 1000,
  20                         "%.3f" % (statistics.stdev(subtest["replicates"]) / 1000),
  21                         suite["name"],
  22                         subtest["name"],
  23                     )
  24                 )