SomeBenchmark.java

@State(Scope.Thread)
@BenchmarkMode(Mode.AverageTime)
@OutputTimeUnit(TimeUnit.MILLISECONDS)
public class SomeBenchmark {
    

    private List<String> stringList = new ArrayList<>();

    @Setup
    public void setup() throws Exception{
        for (int i = 0; i < 10_000_0; i++) {
            stringList.add("String" + i);
        }
    }

    @Benchmark
    public String withStreams(){
        Stream <String> stream = stringList.stream().filter(s -> s.contains("99"));
        return stream.findFirst().get();
    }

    @Benchmark
    public String withLoops(){
        String result = null;
        for (String ss1 : stringList) {
            if (ss1.contains("99")) {
                result = ss1;
                break;
            }
        }
        return result;
    }


    public static void main(String[] args) throws Exception {

        Options options = new OptionsBuilder()
                .include(SomeBenchmark.class.getSimpleName())
                .warmupIterations(3)
                .measurementIterations(10)
                .forks(1)
                .build();

        Runner runner = new Runner(options);
        runner.run();

    }

}