Abseil Common Libraries (C++) (grcp 依赖)
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98 lines
2.5 KiB
98 lines
2.5 KiB
2 years ago
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// Copyright 2022 The Abseil Authors.
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//
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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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// https://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/base/attributes.h"
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#include "absl/base/log_severity.h"
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#include "absl/flags/flag.h"
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#include "absl/log/check.h"
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#include "absl/log/globals.h"
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#include "absl/log/log.h"
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#include "absl/log/log_entry.h"
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#include "absl/log/log_sink.h"
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#include "absl/log/log_sink_registry.h"
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#include "benchmark/benchmark.h"
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namespace {
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class NullLogSink : public absl::LogSink {
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public:
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NullLogSink() { absl::AddLogSink(this); }
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~NullLogSink() override { absl::RemoveLogSink(this); }
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void Send(const absl::LogEntry&) override {}
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};
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constexpr int x = -1;
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void BM_SuccessfulBinaryCheck(benchmark::State& state) {
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int n = 0;
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while (state.KeepRunningBatch(8)) {
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CHECK_GE(n, x);
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CHECK_GE(n, x);
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CHECK_GE(n, x);
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CHECK_GE(n, x);
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CHECK_GE(n, x);
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CHECK_GE(n, x);
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CHECK_GE(n, x);
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CHECK_GE(n, x);
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++n;
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}
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benchmark::DoNotOptimize(n);
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}
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BENCHMARK(BM_SuccessfulBinaryCheck);
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static void BM_SuccessfulUnaryCheck(benchmark::State& state) {
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int n = 0;
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while (state.KeepRunningBatch(8)) {
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CHECK(n >= x);
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CHECK(n >= x);
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CHECK(n >= x);
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CHECK(n >= x);
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CHECK(n >= x);
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CHECK(n >= x);
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CHECK(n >= x);
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CHECK(n >= x);
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++n;
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}
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benchmark::DoNotOptimize(n);
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}
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BENCHMARK(BM_SuccessfulUnaryCheck);
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static void BM_DisabledLogOverhead(benchmark::State& state) {
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absl::ScopedStderrThreshold disable_stderr_logging(
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absl::LogSeverityAtLeast::kInfinity);
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absl::log_internal::ScopedMinLogLevel scoped_min_log_level(
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absl::LogSeverityAtLeast::kInfinity);
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for (auto _ : state) {
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LOG(INFO);
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}
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}
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BENCHMARK(BM_DisabledLogOverhead);
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static void BM_EnabledLogOverhead(benchmark::State& state) {
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absl::ScopedStderrThreshold stderr_logging(
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absl::LogSeverityAtLeast::kInfinity);
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absl::log_internal::ScopedMinLogLevel scoped_min_log_level(
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absl::LogSeverityAtLeast::kInfo);
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ABSL_ATTRIBUTE_UNUSED NullLogSink null_sink;
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for (auto _ : state) {
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LOG(INFO);
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}
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}
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BENCHMARK(BM_EnabledLogOverhead);
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} // namespace
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