package com.bench;

import org.openjdk.jmh.annotations.*;

import java.util.Arrays;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

@BenchmarkMode(Mode.AverageTime)
@OutputTimeUnit(TimeUnit.MILLISECONDS)
@State(Scope.Benchmark)
@Warmup(iterations = 1)
@Measurement(iterations = 3)
@Fork(value = 3)
public class Benchmark {
    private String test = "";
    private String word = "4999";

    @Setup
    public void setup() {
        StringBuilder stringBuilder = new StringBuilder();
        for (int i = 0; i < 100000; i++) {
            stringBuilder.append(i);
            stringBuilder.append(" ");
            test = stringBuilder.toString();
        }
    }

    @org.openjdk.jmh.annotations.Benchmark
    public void streamToMap() {
        Arrays.stream(test.split("\\s+"))
                .collect(Collectors.groupingBy(e -> e, Collectors.counting()));
    }

    @org.openjdk.jmh.annotations.Benchmark
    public void stringHashCodes() {
        Arrays.stream(test.split("\\s+")).mapToInt(String::hashCode).sum();
    }
}