code: /*
   * Copyright (c) 2016-present, RxJava Contributors.
   *
   * 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.
   */
  
  package io.reactivex.rxjava3.core;
  
  import java.util.concurrent.TimeUnit;
  
  import org.openjdk.jmh.annotations.*;
  import org.openjdk.jmh.infra.Blackhole;
  
  import io.reactivex.rxjava3.internal.schedulers.SingleScheduler;
  import io.reactivex.rxjava3.schedulers.Schedulers;
  
  @BenchmarkMode(Mode.Throughput)
  @Warmup(iterations = 5)
  @Measurement(iterations = 5, time = 5, timeUnit = TimeUnit.SECONDS)
  @OutputTimeUnit(TimeUnit.SECONDS)
  @Fork(value = 1)
  @State(Scope.Thread)
  public class RangePerf {
      @Param({ "1", "1000", "1000000" })
      public int times;
  
      Flowable<Integer> range;
  
      Flowable<Integer> rangeAsync;
  
      Flowable<Integer> rangeAsyncPipeline;
  
      @Setup
      public void setup() {
          range = Flowable.range(1, times);
  
          rangeAsync = range.observeOn(Schedulers.single());
  
          rangeAsyncPipeline = range.subscribeOn(new SingleScheduler()).observeOn(Schedulers.single());
      }
  
      @Benchmark
      public Object rangeSync(Blackhole bh) {
          PerfSubscriber lo = new PerfSubscriber(bh);
  
          range.subscribe(lo);
  
          return lo;
      }
  
  //    @Benchmark
      public void rangeAsync(Blackhole bh) throws Exception {
          PerfSubscriber lo = new PerfSubscriber(bh);
  
          rangeAsync.subscribe(lo);
  
          if (times == 1) {
              while (lo.latch.getCount() != 0) { }
          } else {
              lo.latch.await();
          }
      }
  
  //    @Benchmark
      public void rangePipeline(Blackhole bh) throws Exception {
          PerfSubscriber lo = new PerfSubscriber(bh);
  
          rangeAsyncPipeline.subscribe(lo);
  
          if (times == 1) {
              while (lo.latch.getCount() != 0) { }
          } else {
              lo.latch.await();
          }
      }
  
  }
  