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// Copyright (c) 2020 Egor Tensin <Egor.Tensin@gmail.com>
// This file is part of the "math-server" project.
// For details, see https://github.com/egor-tensin/math-server.
// Distributed under the MIT License.
#include <server/lexer/details/parse.hpp>
#include <benchmark/benchmark.h>
#include <string_view>
#include <vector>
// I noticed std::regex_search cropping up in profiling results.
// Switching to boost::regex_search yielded a huge benefit: sometimes a 15x
// increase in regex matching (on VS builds in particular).
// Should be easily reproducible using these micro-benchmarks.
namespace {
class NumberExamples : public benchmark::Fixture {
protected:
std::vector<std::string_view> m_numbers{
"0",
"123",
"0.123",
".123",
"1e9",
"1.87E-18",
"012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789.012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789",
};
};
class WhitespaceExamples : public benchmark::Fixture {
protected:
std::vector<std::string_view> m_whitespace{
"",
" 1",
" 123",
};
};
} // namespace
BENCHMARK_F(NumberExamples, StdParseNumber)(benchmark::State& state) {
using namespace math::server::lexer::details;
for (auto _ : state) {
for (const auto& src : m_numbers) {
impl::std_parse_number(src);
}
}
}
BENCHMARK_F(NumberExamples, BoostParseNumber)(benchmark::State& state) {
using namespace math::server::lexer::details;
for (auto _ : state) {
for (const auto& src : m_numbers) {
impl::boost_parse_number(src);
}
}
}
BENCHMARK_F(WhitespaceExamples, StdParseWhitespace)(benchmark::State& state) {
using namespace math::server::lexer::details;
for (auto _ : state) {
for (const auto& src : m_whitespace) {
impl::std_parse_whitespace(src);
}
}
}
BENCHMARK_F(WhitespaceExamples, BoostParseWhitespace)(benchmark::State& state) {
using namespace math::server::lexer::details;
for (auto _ : state) {
for (const auto& src : m_whitespace) {
impl::boost_parse_whitespace(src);
}
}
}
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