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/**
* Copyright (C) 2018-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the Server Side Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#include <algorithm>
#include <cctype> // NOLINT
#include <functional>
#include <iomanip>
#include <sstream>
#include <string>
#include <vector>
#include <benchmark/benchmark.h>
#include "mongo/base/simple_string_data_comparator.h"
#include "mongo/base/string_data.h"
#include "mongo/util/ctype.h"
// Verify the performance of our string processing algorithms.
// This can include StringData, util/str utilities, etc.
namespace mongo {
namespace {
std::string makeString(size_t size) {
StringData fill = "The quick brown fox jumped over the lazy dog. ";
std::string s;
while (s.size() < size) {
size_t avail = size - s.size();
StringData fillSub = fill.substr(0, std::min(avail, fill.size()));
s.append(fillSub.begin(), fillSub.end());
}
return s;
}
void BM_StringDataEqualCaseInsensitive(benchmark::State& state) {
std::uint64_t items = 0;
std::string s1 = makeString(1000);
std::string s2 = s1;
StringData sd1 = s1;
for (auto _ : state) {
benchmark::DoNotOptimize(sd1.equalCaseInsensitive(s2));
++items;
}
state.SetItemsProcessed(items);
}
BENCHMARK(BM_StringDataEqualCaseInsensitive);
void BM_StdToLower(benchmark::State& state) {
std::uint64_t items = 0;
std::string s1 = makeString(1000);
for (auto _ : state) {
for (char& c : s1)
benchmark::DoNotOptimize(c = std::tolower(c));
++items;
}
state.SetItemsProcessed(items);
}
BENCHMARK(BM_StdToLower);
void BM_MongoCtypeToLower(benchmark::State& state) {
std::uint64_t items = 0;
std::string s1 = makeString(1000);
for (auto _ : state) {
for (char& c : s1)
benchmark::DoNotOptimize(c = ctype::toLower(c));
++items;
}
state.SetItemsProcessed(items);
}
BENCHMARK(BM_MongoCtypeToLower);
void BM_StdIsAlpha(benchmark::State& state) {
std::uint64_t items = 0;
std::string s1 = makeString(1000);
for (auto _ : state) {
for (char& c : s1)
benchmark::DoNotOptimize(std::isalpha(c));
++items;
}
state.SetItemsProcessed(items);
}
BENCHMARK(BM_StdIsAlpha);
void BM_MongoCtypeIsAlpha(benchmark::State& state) {
std::uint64_t items = 0;
std::string s1 = makeString(1000);
for (auto _ : state) {
for (char& c : s1)
benchmark::DoNotOptimize(ctype::isAlpha(c));
++items;
}
state.SetItemsProcessed(items);
}
BENCHMARK(BM_MongoCtypeIsAlpha);
} // namespace
} // namespace mongo
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