ПФ
есть куда оптимизировать его )))
@Warmup(iterations = 1)
@Measurement(iterations = 3)
@BenchmarkMode(Mode.AverageTime)
@OutputTimeUnit(TimeUnit.NANOSECONDS)
@Fork(1)
@State(Scope.Benchmark)
public class JavaSimpleStreamBenchmark {
@Param({"10", "100", "1000", "10000"})
public int arrSz;
int[] values;
private final Random random = new Random();
@Setup(Level.Invocation)
public void setup() {
values = new int[arrSz];
for (int i = 0; i < arrSz; i++) {
values[i] = random.nextInt();
}
}
@Benchmark
public void testMethod(Blackhole b) {
b.consume(Arrays.stream(values)
.map(x -> x + 1)
.map(x -> x * 2)
.map(x -> x + 2)
.reduce(0, Integer::sum));
}
@Benchmark
public void baseline(Blackhole b) {
int result = 0;
for (int i = 0; i < arrSz; i++) {
int x = values[i] * 2 + 2 + 2;
result += x;
}
b.consume(result);
}
}