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+// Copyright 2018 The Abseil Authors.
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include <cmath>
+#include <cstddef>
+#include <cstdint>
+#include <ctime>
+#include <string>
+
+#include "absl/time/time.h"
+#include "benchmark/benchmark.h"
+
+namespace {
+
+//
+// Factory functions
+//
+
+void BM_Duration_Factory_Nanoseconds(benchmark::State& state) {
+ while (state.KeepRunning()) {
+ benchmark::DoNotOptimize(absl::Nanoseconds(1));
+ }
+}
+BENCHMARK(BM_Duration_Factory_Nanoseconds);
+
+void BM_Duration_Factory_Microseconds(benchmark::State& state) {
+ while (state.KeepRunning()) {
+ benchmark::DoNotOptimize(absl::Microseconds(1));
+ }
+}
+BENCHMARK(BM_Duration_Factory_Microseconds);
+
+void BM_Duration_Factory_Milliseconds(benchmark::State& state) {
+ while (state.KeepRunning()) {
+ benchmark::DoNotOptimize(absl::Milliseconds(1));
+ }
+}
+BENCHMARK(BM_Duration_Factory_Milliseconds);
+
+void BM_Duration_Factory_Seconds(benchmark::State& state) {
+ while (state.KeepRunning()) {
+ benchmark::DoNotOptimize(absl::Seconds(1));
+ }
+}
+BENCHMARK(BM_Duration_Factory_Seconds);
+
+void BM_Duration_Factory_Minutes(benchmark::State& state) {
+ while (state.KeepRunning()) {
+ benchmark::DoNotOptimize(absl::Minutes(1));
+ }
+}
+BENCHMARK(BM_Duration_Factory_Minutes);
+
+void BM_Duration_Factory_Hours(benchmark::State& state) {
+ while (state.KeepRunning()) {
+ benchmark::DoNotOptimize(absl::Hours(1));
+ }
+}
+BENCHMARK(BM_Duration_Factory_Hours);
+
+//
+// Arithmetic
+//
+
+void BM_Duration_Addition(benchmark::State& state) {
+ absl::Duration d = absl::Nanoseconds(1);
+ absl::Duration step = absl::Milliseconds(1);
+ while (state.KeepRunning()) {
+ benchmark::DoNotOptimize(d += step);
+ }
+}
+BENCHMARK(BM_Duration_Addition);
+
+void BM_Duration_Subtraction(benchmark::State& state) {
+ absl::Duration d = absl::Seconds(std::numeric_limits<int64_t>::max());
+ absl::Duration step = absl::Milliseconds(1);
+ while (state.KeepRunning()) {
+ benchmark::DoNotOptimize(d -= step);
+ }
+}
+BENCHMARK(BM_Duration_Subtraction);
+
+void BM_Duration_Multiplication_Fixed(benchmark::State& state) {
+ absl::Duration d = absl::Milliseconds(1);
+ absl::Duration s;
+ int i = 0;
+ while (state.KeepRunning()) {
+ benchmark::DoNotOptimize(s += d * (i + 1));
+ ++i;
+ }
+}
+BENCHMARK(BM_Duration_Multiplication_Fixed);
+
+void BM_Duration_Multiplication_Double(benchmark::State& state) {
+ absl::Duration d = absl::Milliseconds(1);
+ absl::Duration s;
+ int i = 0;
+ while (state.KeepRunning()) {
+ benchmark::DoNotOptimize(s += d * (i + 1.0));
+ ++i;
+ }
+}
+BENCHMARK(BM_Duration_Multiplication_Double);
+
+void BM_Duration_Division_Fixed(benchmark::State& state) {
+ absl::Duration d = absl::Seconds(1);
+ int i = 0;
+ while (state.KeepRunning()) {
+ benchmark::DoNotOptimize(d /= i + 1);
+ ++i;
+ }
+}
+BENCHMARK(BM_Duration_Division_Fixed);
+
+void BM_Duration_Division_Double(benchmark::State& state) {
+ absl::Duration d = absl::Seconds(1);
+ int i = 0;
+ while (state.KeepRunning()) {
+ benchmark::DoNotOptimize(d /= i + 1.0);
+ ++i;
+ }
+}
+BENCHMARK(BM_Duration_Division_Double);
+
+void BM_Duration_FDivDuration_Nanoseconds(benchmark::State& state) {
+ double d = 1;
+ int i = 0;
+ while (state.KeepRunning()) {
+ benchmark::DoNotOptimize(
+ d += absl::FDivDuration(absl::Milliseconds(i), absl::Nanoseconds(1)));
+ ++i;
+ }
+}
+BENCHMARK(BM_Duration_FDivDuration_Nanoseconds);
+
+void BM_Duration_IDivDuration_Nanoseconds(benchmark::State& state) {
+ int64_t a = 1;
+ absl::Duration ignore;
+ int i = 0;
+ while (state.KeepRunning()) {
+ benchmark::DoNotOptimize(a +=
+ absl::IDivDuration(absl::Nanoseconds(i),
+ absl::Nanoseconds(1), &ignore));
+ ++i;
+ }
+}
+BENCHMARK(BM_Duration_IDivDuration_Nanoseconds);
+
+void BM_Duration_IDivDuration_Microseconds(benchmark::State& state) {
+ int64_t a = 1;
+ absl::Duration ignore;
+ int i = 0;
+ while (state.KeepRunning()) {
+ benchmark::DoNotOptimize(a += absl::IDivDuration(absl::Microseconds(i),
+ absl::Microseconds(1),
+ &ignore));
+ ++i;
+ }
+}
+BENCHMARK(BM_Duration_IDivDuration_Microseconds);
+
+void BM_Duration_IDivDuration_Milliseconds(benchmark::State& state) {
+ int64_t a = 1;
+ absl::Duration ignore;
+ int i = 0;
+ while (state.KeepRunning()) {
+ benchmark::DoNotOptimize(a += absl::IDivDuration(absl::Milliseconds(i),
+ absl::Milliseconds(1),
+ &ignore));
+ ++i;
+ }
+}
+BENCHMARK(BM_Duration_IDivDuration_Milliseconds);
+
+void BM_Duration_IDivDuration_Seconds(benchmark::State& state) {
+ int64_t a = 1;
+ absl::Duration ignore;
+ int i = 0;
+ while (state.KeepRunning()) {
+ benchmark::DoNotOptimize(
+ a += absl::IDivDuration(absl::Seconds(i), absl::Seconds(1), &ignore));
+ ++i;
+ }
+}
+BENCHMARK(BM_Duration_IDivDuration_Seconds);
+
+void BM_Duration_IDivDuration_Minutes(benchmark::State& state) {
+ int64_t a = 1;
+ absl::Duration ignore;
+ int i = 0;
+ while (state.KeepRunning()) {
+ benchmark::DoNotOptimize(
+ a += absl::IDivDuration(absl::Minutes(i), absl::Minutes(1), &ignore));
+ ++i;
+ }
+}
+BENCHMARK(BM_Duration_IDivDuration_Minutes);
+
+void BM_Duration_IDivDuration_Hours(benchmark::State& state) {
+ int64_t a = 1;
+ absl::Duration ignore;
+ int i = 0;
+ while (state.KeepRunning()) {
+ benchmark::DoNotOptimize(
+ a += absl::IDivDuration(absl::Hours(i), absl::Hours(1), &ignore));
+ ++i;
+ }
+}
+BENCHMARK(BM_Duration_IDivDuration_Hours);
+
+void BM_Duration_ToInt64Nanoseconds(benchmark::State& state) {
+ absl::Duration d = absl::Seconds(100000);
+ while (state.KeepRunning()) {
+ benchmark::DoNotOptimize(absl::ToInt64Nanoseconds(d));
+ }
+}
+BENCHMARK(BM_Duration_ToInt64Nanoseconds);
+
+void BM_Duration_ToInt64Microseconds(benchmark::State& state) {
+ absl::Duration d = absl::Seconds(100000);
+ while (state.KeepRunning()) {
+ benchmark::DoNotOptimize(absl::ToInt64Microseconds(d));
+ }
+}
+BENCHMARK(BM_Duration_ToInt64Microseconds);
+
+void BM_Duration_ToInt64Milliseconds(benchmark::State& state) {
+ absl::Duration d = absl::Seconds(100000);
+ while (state.KeepRunning()) {
+ benchmark::DoNotOptimize(absl::ToInt64Milliseconds(d));
+ }
+}
+BENCHMARK(BM_Duration_ToInt64Milliseconds);
+
+void BM_Duration_ToInt64Seconds(benchmark::State& state) {
+ absl::Duration d = absl::Seconds(100000);
+ while (state.KeepRunning()) {
+ benchmark::DoNotOptimize(absl::ToInt64Seconds(d));
+ }
+}
+BENCHMARK(BM_Duration_ToInt64Seconds);
+
+void BM_Duration_ToInt64Minutes(benchmark::State& state) {
+ absl::Duration d = absl::Seconds(100000);
+ while (state.KeepRunning()) {
+ benchmark::DoNotOptimize(absl::ToInt64Minutes(d));
+ }
+}
+BENCHMARK(BM_Duration_ToInt64Minutes);
+
+void BM_Duration_ToInt64Hours(benchmark::State& state) {
+ absl::Duration d = absl::Seconds(100000);
+ while (state.KeepRunning()) {
+ benchmark::DoNotOptimize(absl::ToInt64Hours(d));
+ }
+}
+BENCHMARK(BM_Duration_ToInt64Hours);
+
+//
+// To/FromTimespec
+//
+
+void BM_Duration_ToTimespec_AbslTime(benchmark::State& state) {
+ absl::Duration d = absl::Seconds(1);
+ while (state.KeepRunning()) {
+ benchmark::DoNotOptimize(absl::ToTimespec(d));
+ }
+}
+BENCHMARK(BM_Duration_ToTimespec_AbslTime);
+
+ABSL_ATTRIBUTE_NOINLINE timespec DoubleToTimespec(double seconds) {
+ timespec ts;
+ ts.tv_sec = seconds;
+ ts.tv_nsec = (seconds - ts.tv_sec) * (1000 * 1000 * 1000);
+ return ts;
+}
+
+void BM_Duration_ToTimespec_Double(benchmark::State& state) {
+ while (state.KeepRunning()) {
+ benchmark::DoNotOptimize(DoubleToTimespec(1.0));
+ }
+}
+BENCHMARK(BM_Duration_ToTimespec_Double);
+
+void BM_Duration_FromTimespec_AbslTime(benchmark::State& state) {
+ timespec ts;
+ ts.tv_sec = 0;
+ ts.tv_nsec = 0;
+ while (state.KeepRunning()) {
+ if (++ts.tv_nsec == 1000 * 1000 * 1000) {
+ ++ts.tv_sec;
+ ts.tv_nsec = 0;
+ }
+ benchmark::DoNotOptimize(absl::DurationFromTimespec(ts));
+ }
+}
+BENCHMARK(BM_Duration_FromTimespec_AbslTime);
+
+ABSL_ATTRIBUTE_NOINLINE double TimespecToDouble(timespec ts) {
+ return ts.tv_sec + (ts.tv_nsec / (1000 * 1000 * 1000));
+}
+
+void BM_Duration_FromTimespec_Double(benchmark::State& state) {
+ timespec ts;
+ ts.tv_sec = 0;
+ ts.tv_nsec = 0;
+ while (state.KeepRunning()) {
+ if (++ts.tv_nsec == 1000 * 1000 * 1000) {
+ ++ts.tv_sec;
+ ts.tv_nsec = 0;
+ }
+ benchmark::DoNotOptimize(TimespecToDouble(ts));
+ }
+}
+BENCHMARK(BM_Duration_FromTimespec_Double);
+
+//
+// String conversions
+//
+
+const char* const kDurations[] = {
+ "0", // 0
+ "123ns", // 1
+ "1h2m3s", // 2
+ "-2h3m4.005006007s", // 3
+ "2562047788015215h30m7.99999999975s", // 4
+};
+const int kNumDurations = sizeof(kDurations) / sizeof(kDurations[0]);
+
+void BM_Duration_FormatDuration(benchmark::State& state) {
+ const std::string s = kDurations[state.range(0)];
+ state.SetLabel(s);
+ absl::Duration d;
+ absl::ParseDuration(kDurations[state.range(0)], &d);
+ while (state.KeepRunning()) {
+ benchmark::DoNotOptimize(absl::FormatDuration(d));
+ }
+}
+BENCHMARK(BM_Duration_FormatDuration)->DenseRange(0, kNumDurations - 1);
+
+void BM_Duration_ParseDuration(benchmark::State& state) {
+ const std::string s = kDurations[state.range(0)];
+ state.SetLabel(s);
+ absl::Duration d;
+ while (state.KeepRunning()) {
+ benchmark::DoNotOptimize(absl::ParseDuration(s, &d));
+ }
+}
+BENCHMARK(BM_Duration_ParseDuration)->DenseRange(0, kNumDurations - 1);
+
+} // namespace