chromium/base/json/json_perftest_decodebench.cc

// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

// This program measures the time taken to decode the given JSON files (the
// command line arguments). It is for manual benchmarking.
//
// Usage:
// $ ninja -C out/foobar json_perftest_decodebench
// $ out/foobar/json_perftest_decodebench -a -n=10 the/path/to/your/*.json
//
// The -n=10 switch controls the number of iterations. It defaults to 1.
//
// The -a switch means to print 1 non-comment line per input file (the average
// iteration time). Without this switch (the default), it prints n non-comment
// lines per input file (individual iteration times). For a single input file,
// building and running this program before and after a particular commit can
// work well with the 'ministat' tool: https://github.com/thorduri/ministat

#include <inttypes.h>
#include <iomanip>
#include <iostream>

#include "base/command_line.h"
#include "base/files/file_util.h"
#include "base/json/json_reader.h"
#include "base/logging.h"
#include "base/time/time.h"

int main(int argc, char* argv[]) { … }