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// SPDX-FileCopyrightText: 2006-2025 Knut Reinert & Freie Universität Berlin
// SPDX-FileCopyrightText: 2016-2025 Knut Reinert & MPI für molekulare Genetik
// SPDX-License-Identifier: BSD-3-Clause
#include <benchmark/benchmark.h>
#include <cstring>
#include <seqan3/std/charconv>
#include <sstream>
#include <string_view>
// -----------------------------------------------------------------------------
// from_char for integral types
// -----------------------------------------------------------------------------
char const * str = "122";
template <typename arithmetic_type>
static void from_char(benchmark::State & state)
{
arithmetic_type val{};
size_t sum{};
for (auto _ : state)
{
std::from_chars(&str[0], &str[0] + sizeof(str), val);
sum += val;
}
// prevent complete optimisation
[[maybe_unused]] volatile auto fin = sum;
}
BENCHMARK_TEMPLATE(from_char, int8_t);
BENCHMARK_TEMPLATE(from_char, uint8_t);
BENCHMARK_TEMPLATE(from_char, int16_t);
BENCHMARK_TEMPLATE(from_char, uint16_t);
BENCHMARK_TEMPLATE(from_char, int32_t);
BENCHMARK_TEMPLATE(from_char, uint32_t);
BENCHMARK_TEMPLATE(from_char, int64_t);
BENCHMARK_TEMPLATE(from_char, uint64_t);
template <typename arithmetic_type>
static void from_stream(benchmark::State & state)
{
arithmetic_type val{};
size_t sum{};
for (auto _ : state)
{
std::stringstream ss;
ss << str;
ss >> val;
sum += val;
}
// prevent complete optimisation
[[maybe_unused]] volatile auto fin = sum;
}
BENCHMARK_TEMPLATE(from_stream, int8_t);
BENCHMARK_TEMPLATE(from_stream, uint8_t);
BENCHMARK_TEMPLATE(from_stream, int16_t);
BENCHMARK_TEMPLATE(from_stream, uint16_t);
BENCHMARK_TEMPLATE(from_stream, int32_t);
BENCHMARK_TEMPLATE(from_stream, uint32_t);
BENCHMARK_TEMPLATE(from_stream, int64_t);
BENCHMARK_TEMPLATE(from_stream, uint64_t);
template <typename arithmetic_type>
static void from_atol(benchmark::State & state)
{
arithmetic_type val{};
size_t sum{};
for (auto _ : state)
{
val = atol(str);
sum += val;
}
// prevent complete optimisation
[[maybe_unused]] volatile auto fin = sum;
}
BENCHMARK_TEMPLATE(from_atol, int8_t);
BENCHMARK_TEMPLATE(from_atol, uint8_t);
BENCHMARK_TEMPLATE(from_atol, int16_t);
BENCHMARK_TEMPLATE(from_atol, uint16_t);
BENCHMARK_TEMPLATE(from_atol, int32_t);
BENCHMARK_TEMPLATE(from_atol, uint32_t);
BENCHMARK_TEMPLATE(from_atol, int64_t);
BENCHMARK_TEMPLATE(from_atol, uint64_t);
#if __has_include(<boost/spirit/include/qi.hpp>)
# include <boost/spirit/include/qi.hpp>
template <typename arithmetic_type>
static void from_boost(benchmark::State & state)
{
arithmetic_type val{};
size_t sum{};
for (auto _ : state)
{
auto it = &str[0];
boost::spirit::qi::phrase_parse(it,
&str[0] + sizeof(str),
boost::spirit::qi::int_,
boost::spirit::ascii::space,
val);
sum += val;
}
// prevent complete optimisation
[[maybe_unused]] volatile auto fin = sum;
}
BENCHMARK_TEMPLATE(from_boost, int8_t);
BENCHMARK_TEMPLATE(from_boost, uint8_t);
BENCHMARK_TEMPLATE(from_boost, int16_t);
BENCHMARK_TEMPLATE(from_boost, uint16_t);
BENCHMARK_TEMPLATE(from_boost, int32_t);
BENCHMARK_TEMPLATE(from_boost, uint32_t);
BENCHMARK_TEMPLATE(from_boost, int64_t);
BENCHMARK_TEMPLATE(from_boost, uint64_t);
#endif // __has_include(<boost/spirit/include/qi.hpp>)
// -----------------------------------------------------------------------------
// from_char for floating point types
// -----------------------------------------------------------------------------
char const * str_float = "122.45e-2";
template <typename arithmetic_type>
static void from_chars_to_float(benchmark::State & state)
{
arithmetic_type val{};
size_t sum{};
for (auto _ : state)
{
std::from_chars(&str_float[0], &str_float[0] + sizeof(str_float), val);
sum += val;
}
// prevent complete optimisation
[[maybe_unused]] volatile auto fin = sum;
}
template <typename arithmetic_type>
static void from_stream_to_float(benchmark::State & state)
{
arithmetic_type val{};
size_t sum{};
for (auto _ : state)
{
std::stringstream ss;
ss << str_float;
ss >> val;
sum += val;
}
// prevent complete optimisation
[[maybe_unused]] volatile auto fin = sum;
}
BENCHMARK_TEMPLATE(from_chars_to_float, float);
BENCHMARK_TEMPLATE(from_chars_to_float, double);
BENCHMARK_TEMPLATE(from_stream_to_float, float);
BENCHMARK_TEMPLATE(from_stream_to_float, double);
BENCHMARK_MAIN();
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