code: package ru.ifmo.nds.jmh.internal;
  
  import java.util.Random;
  import java.util.concurrent.TimeUnit;
  
  import org.openjdk.jmh.annotations.*;
  import org.openjdk.jmh.infra.Blackhole;
  
  import ru.ifmo.nds.util.ArrayHelper;
  import ru.ifmo.nds.util.ArraySorter;
  
  @State(Scope.Benchmark)
  @BenchmarkMode(Mode.AverageTime)
  @OutputTimeUnit(TimeUnit.MICROSECONDS)
  @Timeout(time = 10)
  @Warmup(time = 1, iterations = 6)
  @Measurement(time = 1, iterations = 2)
  @Fork(value = 5)
  public class SortIndicesByValuesBenchmark {
      @Param({"1", "2", "3", "4", "5", "7", "10", "13", "17", "23",
              "31", "42", "56", "74", "100", "133", "177", "237", "316"})
      private int size;
  
      private int[][] data;
      private int[] indices;
  
      @Setup
      public void initialize() {
          int nInstances = 100;
          Random random = new Random(size * 318325462111L);
          data = new int[nInstances][size];
          for (int i = 0; i < nInstances; ++i) {
              for (int j = 0; j < size; ++j) {
                  data[i][j] = random.nextInt();
              }
          }
          indices = new int[size];
      }
  
      @OperationsPerInvocation(100)
      @Benchmark
      public void run(Blackhole bh) {
          for (int[] instance : data) {
              ArrayHelper.fillIdentity(indices, size);
              ArraySorter.sortIndicesByValues(indices, instance, 0, size);
          }
      }
  }
  