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.Arrays;
  import java.util.concurrent.TimeUnit;
  
  import org.openjdk.jmh.annotations.*;
  import org.openjdk.jmh.infra.Blackhole;
  import org.reactivestreams.*;
  
  @BenchmarkMode(Mode.Throughput)
  @Warmup(iterations = 5)
  @Measurement(iterations = 5, time = 1, timeUnit = TimeUnit.SECONDS)
  @OutputTimeUnit(TimeUnit.SECONDS)
  @Fork(value = 1)
  @State(Scope.Thread)
  public class StrictPerf {
      @Param({ "1", "10", "100", "1000", "10000", "100000", "1000000" })
      public int count;
  
      @Param({ "1", "10", "100", "1000", "10000" })
      public int cpu;
  
      Flowable<Integer> source;
  
      @Setup
      public void setup() {
          Integer[] array = new Integer[count];
          Arrays.fill(array, 777);
  
          source = Flowable.fromArray(array);
      }
  
      @Benchmark
      public void internal(Blackhole bh) {
          source.subscribe(new InternalConsumer(bh, cpu));
      }
  
      @Benchmark
      public void external(Blackhole bh) {
          source.subscribe(new ExternalConsumer(bh, cpu));
      }
  
      static final class InternalConsumer implements FlowableSubscriber<Object> {
          final Blackhole bh;
  
          final int cycles;
  
          InternalConsumer(Blackhole bh, int cycles) {
              this.bh = bh;
              this.cycles = cycles;
          }
  
          @Override
          public void onNext(Object t) {
              bh.consume(t);
              Blackhole.consumeCPU(cycles);
          }
  
          @Override
          public void onError(Throwable t) {
              bh.consume(t);
          }
  
          @Override
          public void onComplete() {
              bh.consume(true);
          }
  
          @Override
          public void onSubscribe(Subscription s) {
              s.request(Long.MAX_VALUE);
          }
      }
  
      static final class ExternalConsumer implements Subscriber<Object> {
          final Blackhole bh;
  
          final int cycles;
  
          ExternalConsumer(Blackhole bh, int cycles) {
              this.bh = bh;
              this.cycles = cycles;
          }
  
          @Override
          public void onNext(Object t) {
              bh.consume(t);
              Blackhole.consumeCPU(cycles);
          }
  
          @Override
          public void onError(Throwable t) {
              bh.consume(t);
          }
  
          @Override
          public void onComplete() {
              bh.consume(true);
          }
  
          @Override
          public void onSubscribe(Subscription s) {
              s.request(Long.MAX_VALUE);
          }
      }
  }
  