NullCheck.java

package com.google.common.collect;

import com.google.caliper.Runner;
import com.google.caliper.SimpleBenchmark;

import java.util.Random;

public class NullCheck extends SimpleBenchmark {
  Object[] array = new Object[0x10000];

  @Override
  protected void setUp() throws Exception {
    Random rng = new Random();
    for (int i = 0; i < 0x10000; i++) {
      array[i] = rng.nextBoolean() ? new Object() : null;
    }
  }

  public int timeIfCheck(int reps) {
    int tmp = 0;
    for (int i = 0; i < reps; i++) {
      Object o = array[i & 0xffff];
      if (o != null) {
        tmp += o.hashCode();
      }
    }
    return tmp;
  }

  public int timeTryCatch(int reps) {
    int tmp = 0;
    for (int i = 0; i < reps; i++) {
      try {
        tmp += array[i & 0xffff].hashCode();
      } catch (NullPointerException e) {
      }
    }
    return tmp;
  }

  public static void main(String[] args) {
    Runner.main(NullCheck.class, args);
  }

}