Abseil Common Libraries (C++) (grcp 依赖)
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73 lines
2.0 KiB
73 lines
2.0 KiB
7 years ago
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// Copyright 2018 The Abseil Authors.
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "absl/time/clock.h"
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#if !defined(_WIN32)
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#include <sys/time.h>
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#endif // _WIN32
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#include <cstdio>
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#include "absl/base/internal/cycleclock.h"
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#include "benchmark/benchmark.h"
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namespace {
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void BM_Clock_Now_AbslTime(benchmark::State& state) {
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while (state.KeepRunning()) {
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benchmark::DoNotOptimize(absl::Now());
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}
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}
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BENCHMARK(BM_Clock_Now_AbslTime);
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void BM_Clock_Now_GetCurrentTimeNanos(benchmark::State& state) {
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while (state.KeepRunning()) {
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benchmark::DoNotOptimize(absl::GetCurrentTimeNanos());
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}
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}
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BENCHMARK(BM_Clock_Now_GetCurrentTimeNanos);
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void BM_Clock_Now_AbslTime_ToUnixNanos(benchmark::State& state) {
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while (state.KeepRunning()) {
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benchmark::DoNotOptimize(absl::ToUnixNanos(absl::Now()));
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}
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}
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BENCHMARK(BM_Clock_Now_AbslTime_ToUnixNanos);
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void BM_Clock_Now_CycleClock(benchmark::State& state) {
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while (state.KeepRunning()) {
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benchmark::DoNotOptimize(absl::base_internal::CycleClock::Now());
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}
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}
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BENCHMARK(BM_Clock_Now_CycleClock);
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#if !defined(_WIN32)
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static void BM_Clock_Now_gettimeofday(benchmark::State& state) {
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struct timeval tv;
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while (state.KeepRunning()) {
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benchmark::DoNotOptimize(gettimeofday(&tv, nullptr));
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}
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}
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BENCHMARK(BM_Clock_Now_gettimeofday);
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static void BM_Clock_Now_clock_gettime(benchmark::State& state) {
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struct timespec ts;
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while (state.KeepRunning()) {
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benchmark::DoNotOptimize(clock_gettime(CLOCK_REALTIME, &ts));
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}
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}
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BENCHMARK(BM_Clock_Now_clock_gettime);
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#endif // _WIN32
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} // namespace
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