cppcache/benchmark/NoopBM.cpp

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 <benchmark/benchmark.h>

#include <thread>

/**
 * Benchmarks a no-op for comparison to other benchmarks. If your benchmark has
 * similar results it is possible that it has been optimized to a no-op.
 */
void noop(benchmark::State& state) {
  for (auto _ : state) {
  }
}

BENCHMARK(noop)
    ->ThreadRange(1, std::thread::hardware_concurrency())
    ->UseRealTime();