93 lines
2.5 KiB
C++
93 lines
2.5 KiB
C++
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// This file is a part of toml++ and is subject to the the terms of the MIT license.
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// Copyright (c) Mark Gillard <mark.gillard@outlook.com.au>
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// See https://github.com/marzer/tomlplusplus/blob/master/LICENSE for the full license text.
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// SPDX-License-Identifier: MIT
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// This example is just a short-n-shiny benchmark.
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#include "examples.h"
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#define TOML_ENABLE_UNRELEASED_FEATURES 0
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#include <toml++/toml.h>
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namespace
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{
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using namespace std::string_view_literals;
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using namespace std::chrono_literals;
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using clock = std::chrono::steady_clock;
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using std::chrono::nanoseconds;
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using std::chrono::duration;
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static constexpr size_t iterations = 10000;
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}
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int main(int argc, char** argv)
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{
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const auto file_path = std::string(argc > 1 ? std::string_view{ argv[1] } : "benchmark_data.toml"sv);
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// read the file into a string first to remove file I/O from the benchmark
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std::string file_content;
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{
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std::ifstream file(file_path, std::ifstream::in | std::ifstream::binary | std::ifstream::ate);
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if (!file)
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{
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std::cerr << "File '"sv << file_path << "'could not be opened for reading\n"sv;
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return -1;
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}
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const auto file_size = file.tellg();
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if (file_size == -1)
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{
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std::cerr << "File '"sv << file_path << "' could not be opened for reading\n"sv;
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return -1;
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}
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file.seekg(0, std::ifstream::beg);
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file_content.resize(static_cast<size_t>(file_size));
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file.read(file_content.data(), static_cast<std::streamsize>(file_size));
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if (!file.eof() && !file)
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{
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std::cerr << "Failed to read contents of file '"sv << file_path << "'\n"sv;
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return -1;
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}
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}
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// parse once to make sure it isn't garbage
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{
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#if TOML_EXCEPTIONS
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try
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{
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const auto result = toml::parse(file_content);
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}
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catch (const toml::parse_error& err)
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{
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std::cerr << err << "\n";
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return 1;
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}
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#else
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const auto result = toml::parse(file_content);
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if (!result)
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std::cerr << result.error() << "\n";
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return 1;
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#endif
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}
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// run the benchmark
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std::cout << "Parsing '"sv << file_path << "' "sv << iterations << " times...\n"sv;
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nanoseconds cumulative;
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for (size_t i = 0; i < iterations; i++)
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{
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{
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const auto start = clock::now();
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const auto result = toml::parse(file_content);
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cumulative += clock::now() - start;
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}
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}
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const auto cumulative_sec = std::chrono::duration_cast<duration<double>>(cumulative).count();
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const auto mean_sec = cumulative_sec / static_cast<double>(iterations);
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std::cout << " total: "sv << cumulative_sec << " s\n"sv
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<< " mean: "sv << mean_sec << " s\n"sv;
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return 0;
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}
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