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Diffstat (limited to 'absl/time/duration_benchmark.cc')
| -rw-r--r-- | absl/time/duration_benchmark.cc | 361 |
1 files changed, 361 insertions, 0 deletions
diff --git a/absl/time/duration_benchmark.cc b/absl/time/duration_benchmark.cc new file mode 100644 index 00000000..54f89a1f --- /dev/null +++ b/absl/time/duration_benchmark.cc @@ -0,0 +1,361 @@ +// 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 |