SmallBenchmark.java

import com.squareup.moshi.JsonAdapter;
import com.squareup.moshi.Moshi;
import com.squareup.moshi.Types;
import java.io.IOException;
import java.lang.reflect.Type;
import java.util.List;
import java.util.concurrent.TimeUnit;
import org.openjdk.jmh.annotations.Benchmark;
import org.openjdk.jmh.annotations.BenchmarkMode;
import org.openjdk.jmh.annotations.Mode;
import org.openjdk.jmh.annotations.OutputTimeUnit;
import org.openjdk.jmh.annotations.Scope;
import org.openjdk.jmh.annotations.State;

@BenchmarkMode({Mode.AverageTime})
@OutputTimeUnit(TimeUnit.MILLISECONDS)
@State(Scope.Benchmark) public class Benchmarker {

  private static final String JSON;

  static {
    StringBuilder sb = new StringBuilder();
    sb.append("[");
    for (int i = 0; i < 300; i++) {
      if (i > 0) sb.append(", ");
      sb.append("922337203685477580").append(i % 7);
    }
    sb.append("]");

    JSON = sb.toString();
  }

  private static final Type LIST_OF_LONGS_TYPE = Types.newParameterizedType(List.class, Long.class);

  private Moshi moshi = new Moshi.Builder().build();

  @Benchmark public List<Long> parseLongs() throws IOException {
    JsonAdapter<List<Long>> adapter = moshi.adapter(LIST_OF_LONGS_TYPE);
    return adapter.fromJson(JSON);
  }
}