SumBenchmark.java

import org.openjdk.jmh.annotations.*;

import java.util.concurrent.TimeUnit;
import java.util.stream.IntStream;
import java.util.stream.LongStream;
import java.util.stream.Stream;

@Warmup(iterations = 5)
@Measurement(iterations = 10)
@Fork(1)
@BenchmarkMode(Mode.AverageTime)
@OutputTimeUnit(TimeUnit.MICROSECONDS)
public class SumBenchmark {

    @Benchmark
    public long primitiveSumTest() {
        long sum = 0L;
        for (long i = 0L; i < 1000L; i++) {
            sum += i;
        }
        return sum;
    }


    @Benchmark
    public long wrapperSumTest() {
        Long sum = 0L;
        for (Long i = 0L; i < 1000L; i++) {
            sum += i;
        }
        return sum;
    }

    @Benchmark
    public long wrapper2SumTest() {
        Long sum = new Long(0L);
        for (Long i = new Long(0L); i < 1000L; i = Long.sum(i, 1L)) {
            sum = Long.sum(sum, i);
        }
        return sum;
    }

    @Benchmark
    public int intStreamSumTest() {
        return IntStream.iterate(0, i -> i + 1).limit(1000).sum();
    }

    @Benchmark
    public int intStreamRangeSumTest() {
        return IntStream.rangeClosed(0, 1000).sum();
    }

    @Benchmark
    public long longStreamTest() throws Exception {
        return LongStream.iterate(0, i -> i + 1).limit(1000).sum();
    }

    @Benchmark
    public long longStreamRangeTest() throws Exception {
        return LongStream.rangeClosed(0, 1000).sum();
    }

    @Benchmark
    public long streamTest() throws Exception {
        return Stream.iterate(0, i -> i + 1).limit(1000).reduce(Integer::sum).get();
    }
}

Benchmark	Mode	Cnt	Score	Error	Units
SumBenchmark.primitiveSumTest	avgt	10	0.438 ± 0.024	us/op
SumBenchmark.wrapperSumTest	avgt	10	6.942 ± 0.406	us/op
SumBenchmark.wrapper2SumTest	avgt	10	6.761 ± 0.305	us/op
SumBenchmark.intStreamSumTest	avgt	10	7.409 ± 0.781	us/op
SumBenchmark.intStreamRangeSumTest	avgt	10	2.383 ± 0.107	us/op
SumBenchmark.longStreamTest	avgt	10	7.292 ± 0.268	us/op
SumBenchmark.longStreamRangeTest	avgt	10	2.340 ± 0.075	us/op
SumBenchmark.streamTest	avgt	10	14.122 ± 1.034	us/op

pom.xml dependency

    <dependency>
      <groupId>org.openjdk.jmh</groupId>
      <artifactId>jmh-core</artifactId>
      <version>1.11.3</version>
      <scope>test</scope>
    </dependency>

    <dependency>
      <groupId>org.openjdk.jmh</groupId>
      <artifactId>jmh-generator-annprocess</artifactId>
      <version>1.11.3</version>
      <scope>test</scope>
    </dependency>