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#include <library/cpp/case_insensitive_string/ut_gtest/util/locale_guard.h>
#include <library/cpp/case_insensitive_string/case_insensitive_string.h>
#include <benchmark/benchmark.h>
#include <util/generic/string.h>
#include <util/random/random.h>
#include <array>
#include <cerrno>
#include <clocale>
#include <cstring>
namespace {
template <typename TStrBuf>
void BenchmarkCompare(benchmark::State& state, TStrBuf s1, TStrBuf s2) {
for (auto _ : state) {
benchmark::DoNotOptimize(s1);
benchmark::DoNotOptimize(s2);
auto cmp = s1.compare(s2);
benchmark::DoNotOptimize(cmp);
}
}
char RandomPrintableChar() {
while (true) {
unsigned char c = RandomNumber(127u);
if (std::isprint(c)) {
return c;
}
}
}
const std::array<const char*, 2> Locales = {
"C",
"ru_RU.CP1251",
};
}
template <typename TStrBuf>
void CompareEqualStrings(benchmark::State& state) {
SetRandomSeed(123);
size_t n = state.range(0);
size_t locIndex = state.range(1);
TLocaleGuard loc(Locales[locIndex]);
if (loc.Error()) {
state.SkipWithMessage(TString::Join(Locales[locIndex], " locale is not available: ", loc.Error()));
return;
}
TString s1(Reserve(n)), s2(Reserve(n));
for (size_t i = 0; i < n; ++i) {
auto c = RandomPrintableChar();
s1.push_back(std::toupper(c));
s2.push_back(std::tolower(c));
}
BenchmarkCompare(state, TStrBuf(s1.data(), s1.size()), TStrBuf(s2.data(), s2.size()));
}
#define BENCH_ARGS ArgNames({"strlen", "locale"})->ArgsProduct({{2, 4, 8, 16, 32, 64}, {0, 1}})
BENCHMARK(CompareEqualStrings<TCaseInsensitiveStringBuf>)->BENCH_ARGS;
BENCHMARK(CompareEqualStrings<TCaseInsensitiveAsciiStringBuf>)->BENCH_ARGS;
#undef BENCH_ARGS
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