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// Copyright 2020 Junekey Jeon
//
// The contents of this file may be used under the terms of
// the Apache License v2.0 with LLVM Exceptions.
//
// (See accompanying file LICENSE-Apache or copy at
// https://llvm.org/foundation/relicensing/LICENSE.txt)
//
// Alternatively, the contents of this file may be used under the terms of
// the Boost Software License, Version 1.0.
// (See accompanying file LICENSE-Boost or copy at
// https://www.boost.org/LICENSE_1_0.txt)
//
// Unless required by applicable law or agreed to in writing, this software
// is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.
#include "dragonbox/dragonbox_to_chars.h"
#include "random_float.h"
#include <chrono>
#include <iostream>
template <class Float>
static void uniform_random_perf_test(std::size_t number_of_tests)
{
std::cout << "Generating random samples...\n";
auto rg = generate_correctly_seeded_mt19937_64();
std::vector<Float> samples(number_of_tests);
for (auto& sample : samples) {
sample = uniformly_randomly_generate_general_float<Float>(rg);
}
std::cout << "Performing test...\n";
char buffer[41];
auto from = std::chrono::steady_clock::now();
for (auto& sample : samples) {
jkj::dragonbox::to_chars(sample, buffer);
}
auto dur = std::chrono::steady_clock::now() - from;
std::cout << "Average time: " <<
double(std::chrono::duration_cast<std::chrono::nanoseconds>(dur).count()) / number_of_tests << "ns\n";
}
template <class Float>
static void digit_perf_test(unsigned int digits, std::size_t number_of_tests)
{
std::cout << "Generating random samples...\n";
auto rg = generate_correctly_seeded_mt19937_64();
std::vector<Float> samples(number_of_tests);
for (auto& sample : samples) {
sample = randomly_generate_float_with_given_digits<Float>(digits, rg);
}
std::cout << "Performing test...\n";
char buffer[41];
auto from = std::chrono::steady_clock::now();
for (auto& sample : samples) {
jkj::dragonbox::to_chars(sample, buffer);
}
auto dur = std::chrono::steady_clock::now() - from;
std::cout << "Average time: " <<
double(std::chrono::duration_cast<std::chrono::nanoseconds>(dur).count()) / number_of_tests << "ns\n";
}
int main()
{
constexpr bool run_uniform_random_float = true;
constexpr std::size_t number_of_uniform_random_perf_tests_float = 100000000;
constexpr bool run_uniform_random_double = true;
constexpr std::size_t number_of_uniform_random_perf_tests_double = 100000000;
constexpr bool run_digit_float = false;
constexpr unsigned int digits_for_perf_test_float = 6;
constexpr std::size_t number_of_digit_perf_tests_float = 40000000;
constexpr bool run_digit_double = false;
constexpr static unsigned int digits_for_perf_test_double = 17;
constexpr static std::size_t number_of_digit_perf_tests_double = 6000000;
if constexpr (run_uniform_random_float) {
std::cout << "[Running the algorithm with uniformly randomly generated float inputs...]\n";
uniform_random_perf_test<float>(number_of_uniform_random_perf_tests_float);
std::cout << "Done.\n\n\n";
}
if constexpr (run_uniform_random_double) {
std::cout << "[Running the algorithm with uniformly randomly generated double inputs...]\n";
uniform_random_perf_test<double>(number_of_uniform_random_perf_tests_double);
std::cout << "Done.\n\n\n";
}
if constexpr (run_digit_float) {
std::cout << "[Running the algorithm with float inputs of digits = "
<< digits_for_perf_test_float << "...]\n";
digit_perf_test<float>(digits_for_perf_test_float, number_of_digit_perf_tests_float);
std::cout << "Done.\n\n\n";
}
if constexpr (run_digit_double) {
std::cout << "[Running the algorithm with double inputs of digits = "
<< digits_for_perf_test_double << "...]\n";
digit_perf_test<double>(digits_for_perf_test_double, number_of_digit_perf_tests_double);
std::cout << "Done.\n\n\n";
}
}
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