bench.py - mozsearch

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#!/usr/bin/env python3

import json

import statistics

import subprocess

import sys

proc = subprocess.Popen(["./mach", "gtest", sys.argv[1]], stdout=subprocess.PIPE)

for line in proc.stdout:

    if line.startswith(b"PERFHERDER_DATA:"):

        data = json.loads(line[len("PERFHERDER_DATA:") :].decode("utf8"))

        for suite in data["suites"]:

            for subtest in suite["subtests"]:

                # pylint --py3k W1619

                print(

                    "%4d.%03d ± %6s ms    %s.%s"

% (

                        subtest["value"] / 1000.0,

                        subtest["value"] % 1000,

                        "%.3f" % (statistics.stdev(subtest["replicates"]) / 1000),

                        suite["name"],

                        subtest["name"],