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#include <library/cpp/testing/gbenchmark/benchmark.h>
#include <util/datetime/base.h>
#include <util/random/fast.h>
void BM_GmTimeR(benchmark::State& state) {
time_t now = TInstant::Now().TimeT();
struct tm buf {};
for (auto _ : state) {
Y_DO_NOT_OPTIMIZE_AWAY(GmTimeR(&now, &buf));
}
}
void BM_gmtime_r(benchmark::State& state) {
time_t now = TInstant::Now().TimeT();
struct tm buf {};
for (auto _ : state) {
Y_DO_NOT_OPTIMIZE_AWAY(gmtime_r(&now, &buf));
}
}
void BM_GmTimeRRandom(benchmark::State& state, TDuration window) {
time_t now = TInstant::Now().TimeT();
struct tm buf {};
TFastRng<ui32> rng(2);
const size_t range = window.Seconds();
for (auto _ : state) {
size_t offset = rng.GenRand() % range;
time_t v = now - offset;
Y_DO_NOT_OPTIMIZE_AWAY(GmTimeR(&v, &buf));
}
}
BENCHMARK(BM_GmTimeR);
BENCHMARK(BM_gmtime_r);
BENCHMARK_CAPTURE(BM_GmTimeRRandom, last_hour, TDuration::Hours(1));
BENCHMARK_CAPTURE(BM_GmTimeRRandom, last_day, TDuration::Days(1));
BENCHMARK_CAPTURE(BM_GmTimeRRandom, last_mount, TDuration::Days(31));
BENCHMARK_CAPTURE(BM_GmTimeRRandom, last_year, TDuration::Days(365));
BENCHMARK_CAPTURE(BM_GmTimeRRandom, last_decade, TDuration::Days(3653));
BENCHMARK_CAPTURE(BM_GmTimeRRandom, last_half_centry, TDuration::Days(18262));
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