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string_concat.cpp
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string_concat.cpp
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#include <benchmark/benchmark.h>
#include <iostream>
#include <numeric>
#include <sstream>
#include <string>
#include <vector>
const std::vector<std::string> test_strings_splitted{
"2020-03-17 16:58:06", "1000001", "3118", "1022", "192.168.152.50", "project.view", "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_3) AppleWebKit/537.36",
"2020-03-17 16:58:08", "1000002", "2640", "1137", "192.168.195.114", "collection.view_archive", "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_3) AppleWebKit/537.36",
"2020-03-17 16:58:58", "1000003", "111", "1121", "192.168.228.209", "user.delete", "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_3) AppleWebKit/537.36",
"2020-03-17 16:59:02", "1000004", "135", "1060", "192.168.194.102", "doc.update", "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_3) AppleWebKit/537.36",
"2020-03-17 16:59:08", "1000005", "2356", "1109", "192.168.174.108", "project.view", "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_3) AppleWebKit/537.36"};
const std::vector<std::string> test_strings_one_line{
"2020-03-17 16:58:06\t1000001\t3118\t1022\t192.168.152.50\tproject.view\tMozilla/5.0 (Macintosh; Intel Mac OS X 10_15_3) AppleWebKit/537.36",
"2020-03-17 16:58:08\t1000002\t2640\t1137\t192.168.195.114\tcollection.view_archive\tMozilla/5.0 (Macintosh; Intel Mac OS X 10_15_3) AppleWebKit/537.36",
"2020-03-17 16:58:58\t1000003\t111\t1121\t192.168.228.209\tuser.delete\tMozilla/5.0 (Macintosh; Intel Mac OS X 10_15_3) AppleWebKit/537.36",
"2020-03-17 16:59:02\t1000004\t135\t1060\t192.168.194.102\tdoc.update\tMozilla/5.0 (Macintosh; Intel Mac OS X 10_15_3) AppleWebKit/537.36",
"2020-03-17 16:59:08\t1000005\t2356\t1109\t192.168.174.108\tproject.view\tMozilla/5.0 (Macintosh; Intel Mac OS X 10_15_3) AppleWebKit/537.36"};
std::vector<std::vector<std::string>> test_string_sets{
{"2020-03-17 16:58:06", "1000001", "3118", "1022", "192.168.152.50", "project.view", "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_3) AppleWebKit/537.36"},
{"2020-03-17 16:58:08", "1000002", "2640", "1137", "192.168.195.114", "collection.view_archive", "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_3) AppleWebKit/537.36"},
{"2020-03-17 16:58:58", "1000003", "111", "1121", "192.168.228.209", "user.delete", "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_3) AppleWebKit/537.36"},
{"2020-03-17 16:59:02", "1000004", "135", "1060", "192.168.194.102", "doc.update", "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_3) AppleWebKit/537.36"},
{"2020-03-17 16:59:08", "1000005", "2356", "1109", "192.168.174.108", "project.view", "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_3) AppleWebKit/537.36"}};
struct Dataset_v02_Position {
Dataset_v02_Position(std::string::size_type start, std::string::size_type end) : start_{start}, end_{end} {}
std::string::size_type start_;
std::string::size_type end_;
};
struct Dataset_v02 {
Dataset_v02(const std::string& line, char delim) : line_{line} {
std::string::size_type start_pos = 0;
std::string::size_type pos;
while ((pos = line.find(delim, start_pos)) != std::string::npos) {
positions.emplace_back(start_pos, pos);
start_pos = pos + 1;
}
if (start_pos < line.size())
positions.emplace_back(start_pos, line.size());
}
const std::string line_;
std::vector<Dataset_v02_Position> positions;
};
struct Dataset_v03 {
Dataset_v03(const std::string& line, char delim) : line_{line} {
std::string::size_type start_pos = 0;
std::string::size_type pos;
while ((pos = line_.find(delim, start_pos)) != std::string::npos) {
positions.push_back(line_.data() + start_pos);
*(line_.data() + pos) = '\0';
start_pos = pos + 1;
}
if (start_pos < line_.size())
positions.push_back(line_.data() + start_pos);
}
std::string line_;
std::vector<const char*> positions;
};
std::string concat_strings(const std::vector<std::string>& strings)
{
std::string big;
for (const auto& s : strings)
big += s;
return big;
}
std::string concat_strings_with_stringstream(const std::vector<std::string>& strings)
{
std::stringstream big;
for (const auto& s : strings)
big << s;
return big.str();
}
std::string concat_strings_with_accumulate(const std::vector<std::string>& strings)
{
return std::accumulate(std::next(strings.begin()), strings.end(), strings[0]);
}
std::string concat_string_sets(const std::vector<std::vector<std::string>>& string_sets, const std::string& delim)
{
std::string big;
for (std::size_t i = 0; i < string_sets.size(); ++i) {
for (const auto& s : string_sets[i])
big += s;
if (i < (string_sets.size() - 1))
big += delim;
}
return big;
}
std::string concat_string_sets_with_stringstream(const std::vector<std::vector<std::string>>& string_sets, const std::string& delim)
{
std::stringstream big;
for (std::size_t i = 0; i < string_sets.size(); ++i) {
for (const auto& s : string_sets[i])
big << s;
if (i < (string_sets.size() - 1))
big << delim;
}
return big.str();
}
std::string concat_string_sets_with_accumulate(const std::vector<std::vector<std::string>>& string_sets, const std::string& delim)
{
std::string big;
for (std::size_t i = 0; i < string_sets.size(); ++i) {
big += std::accumulate(std::next(string_sets[i].begin()), string_sets[i].end(), string_sets[i][0]);
if (i < (string_sets.size() - 1))
big += delim;
}
return big;
}
std::string concat_strings_with_dataset_v02(const std::vector<Dataset_v02>& datasets, const std::string& delim)
{
std::string big;
for (std::size_t i = 0; i < datasets.size(); ++i) {
const auto& ds{datasets[i]};
for (const auto& pos : ds.positions) {
big += std::string{ds.line_, pos.start_, pos.end_ - pos.start_};
}
if (i < (datasets.size() - 1))
big += delim;
}
return big;
}
std::string concat_strings_with_dataset_v03(const std::vector<Dataset_v03>& datasets, const std::string& delim)
{
std::string big;
for (std::size_t i = 0; i < datasets.size(); ++i) {
const auto& ds{datasets[i]};
for (const auto& pos : ds.positions)
big += std::string{pos};
if (i < (datasets.size() - 1))
big += delim;
}
return big;
}
std::string concat_strings_with_dataset_v03_operator_plus(const std::vector<Dataset_v03>& datasets, const std::string& delim)
{
std::string big;
for (std::size_t i = 0; i < datasets.size(); ++i) {
for (const auto& pos : datasets[i].positions)
big += pos;
if (i < (datasets.size() - 1))
big += delim;
}
return big;
}
std::string concat_strings_with_dataset_v03_iterators(const std::vector<Dataset_v03>& datasets, const std::string& delim)
{
std::string big;
for (auto p = datasets.cbegin(); p != datasets.cend(); ++p) {
if (p != datasets.cbegin())
big += delim;
for (const auto& pos : p->positions)
big += pos;
}
return big;
}
std::string concat_strings_with_dataset_v03_accumulate(const std::vector<Dataset_v03>& datasets, const std::string& delim)
{
std::string big;
for (auto p = datasets.cbegin(); p != datasets.cend(); ++p) {
if (p != datasets.cbegin())
big += delim;
big += std::accumulate(std::next(p->positions.begin()), p->positions.end(), std::string{p->positions[0]});
}
return big;
}
static void BM_ConcatStrings(benchmark::State& state)
{
for (auto _ : state) {
auto s{concat_strings(test_strings_splitted)};
benchmark::DoNotOptimize(s);
}
}
static void BM_ConcatStrings_with_Stringstream(benchmark::State& state)
{
for (auto _ : state) {
auto s{concat_strings_with_stringstream(test_strings_splitted)};
benchmark::DoNotOptimize(s);
}
}
static void BM_ConcatStrings_with_accumulate(benchmark::State& state)
{
for (auto _ : state) {
auto s{concat_strings_with_accumulate(test_strings_splitted)};
benchmark::DoNotOptimize(s);
}
}
static void BM_ConcatStringSets(benchmark::State& state)
{
for (auto _ : state) {
auto s{concat_string_sets(test_string_sets, ",")};
benchmark::DoNotOptimize(s);
}
}
static void BM_ConcatStringSets_with_Stringstream(benchmark::State& state)
{
for (auto _ : state) {
auto s{concat_string_sets_with_stringstream(test_string_sets, ",")};
benchmark::DoNotOptimize(s);
}
}
static void BM_ConcatStringSets_with_accumulate(benchmark::State& state)
{
for (auto _ : state) {
auto s{concat_string_sets_with_accumulate(test_string_sets, ",")};
benchmark::DoNotOptimize(s);
}
}
static void BM_ConcatStrings_with_Dataset_v02_start_and_end_positions(benchmark::State& state)
{
std::vector<Dataset_v02> datasets;
for (const auto& line : test_strings_one_line)
datasets.emplace_back(line, '\t');
for (auto _ : state) {
auto s{concat_strings_with_dataset_v02(datasets, ",")};
benchmark::DoNotOptimize(s);
}
}
static void BM_ConcatStrings_with_Dataset_v03_char_pointer(benchmark::State& state)
{
std::vector<Dataset_v03> datasets;
for (const auto& line : test_strings_one_line)
datasets.emplace_back(line, '\t');
for (auto _ : state) {
auto s{concat_strings_with_dataset_v03(datasets, ",")};
benchmark::DoNotOptimize(s);
}
}
static void BM_ConcatStrings_with_Dataset_v03_operator_plus(benchmark::State& state)
{
std::vector<Dataset_v03> datasets;
for (const auto& line : test_strings_one_line)
datasets.emplace_back(line, '\t');
for (auto _ : state) {
auto s{concat_strings_with_dataset_v03_operator_plus(datasets, ",")};
benchmark::DoNotOptimize(s);
}
}
static void BM_ConcatStrings_with_Dataset_v03_iterators(benchmark::State& state)
{
std::vector<Dataset_v03> datasets;
for (const auto& line : test_strings_one_line)
datasets.emplace_back(line, '\t');
for (auto _ : state) {
auto s{concat_strings_with_dataset_v03_iterators(datasets, ",")};
benchmark::DoNotOptimize(s);
}
}
static void BM_ConcatStrings_with_Dataset_v03_accumulate(benchmark::State& state)
{
std::vector<Dataset_v03> datasets;
for (const auto& line : test_strings_one_line)
datasets.emplace_back(line, '\t');
for (auto _ : state) {
auto s{concat_strings_with_dataset_v03_accumulate(datasets, ",")};
benchmark::DoNotOptimize(s);
}
}
BENCHMARK(BM_ConcatStrings);
BENCHMARK(BM_ConcatStrings_with_Stringstream);
BENCHMARK(BM_ConcatStrings_with_accumulate);
BENCHMARK(BM_ConcatStringSets);
BENCHMARK(BM_ConcatStringSets_with_Stringstream);
BENCHMARK(BM_ConcatStringSets_with_accumulate);
BENCHMARK(BM_ConcatStrings_with_Dataset_v02_start_and_end_positions);
BENCHMARK(BM_ConcatStrings_with_Dataset_v03_char_pointer);
BENCHMARK(BM_ConcatStrings_with_Dataset_v03_operator_plus);
BENCHMARK(BM_ConcatStrings_with_Dataset_v03_iterators);
BENCHMARK(BM_ConcatStrings_with_Dataset_v03_accumulate);
BENCHMARK_MAIN();