LongAdder Benchmarks

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BenchmarkRareReads:

Benchmark               Mode  Cnt       Score      Error  Units
Benchmarks.atomicLong  thrpt   20   39927.173 ± 3303.513  ops/s
Benchmarks.longAdder   thrpt   20  232363.221 ± 8054.883  ops/s

BenchmarkFrequentReads:

Benchmarks.atomicLong  thrpt   20  37728.593 ±  639.109  ops/s
Benchmarks.longAdder   thrpt   20  42800.584 ± 2916.690  ops/s

BenchmarksFrequentReads.java

public class Benchmarks {
    private static int LOOPS = 1_000;

    @Benchmark
    @Fork(value = 1, warmups = 2)
    @GroupThreads(100)
    public void atomicLong(Counters counters, Blackhole blackhole) {
        for (int i = 0; i < LOOPS; ++i) {
            blackhole.consume(counters.atomicCounter.incrementAndGet());
        }
    }

    @Benchmark
    @Fork(value = 1, warmups = 2)
    @GroupThreads(100)
    public void longAdder(Counters counters, Blackhole blackhole) {
        for (int i = 0; i < LOOPS; ++i) {
            counters.adderCounter.increment();
            blackhole.consume(counters.adderCounter.sum());
        }
    }
}

BenchmarksRareReads.java

public class Benchmarks {
    private static int LOOPS = 1_000;

    @Benchmark
    @Fork(value = 1, warmups = 2)
    @GroupThreads(100)
    public void atomicLong(Counters counters, Blackhole blackhole) {
        for (int i = 0; i < LOOPS; ++i) {
            counters.atomicCounter.incrementAndGet();
        }
        blackhole.consume(counters.atomicCounter.get());
    }

    @Benchmark
    @Fork(value = 1, warmups = 2)
    @GroupThreads(100)
    public void longAdder(Counters counters, Blackhole blackhole) {
        for (int i = 0; i < LOOPS; ++i) {
            counters.adderCounter.increment();
        }
        blackhole.consume(counters.adderCounter.sum());
    }
}