fork download

copy

package com.example.app;
 
import org.openjdk.jmh.annotations.Benchmark;
import org.openjdk.jmh.annotations.BenchmarkMode;
import org.openjdk.jmh.annotations.Fork;
import org.openjdk.jmh.annotations.Mode;
import org.openjdk.jmh.infra.Blackhole;
 
import java.util.HashMap;
import java.util.Map;
import java.util.Random;
 
public class Bench {
    public static void main(String[] args) throws Exception {
        org.openjdk.jmh.Main.main(args);
    }
 
    static final int size = 100_000;
    static final Map<String, String> hashmap = hashMap();
    static final Map<String, String> copyOf = Map.copyOf(hashMap);
    static final Random random = new Random();
 
    private static Map<String, String> hashMap() {
        Map<String, String> hashmap  = new HashMap<>();
        for (int i = 0; i < size; ++i) {
            hashmap.put(Integer.toString(i), "");
        }
        return hashmap;
    }
 
    @Benchmark
    @Fork(value = 1, warmups = 1)
    @BenchmarkMode(Mode.Throughput)
    public void hash(Blackhole blackhole) {
        String key = Integer.toString(random.nextInt(size));
        blackhole.consume(hashmap.get(key));
    }
 
    @Benchmark
    @Fork(value = 1, warmups = 1)
    @BenchmarkMode(Mode.Throughput)
    public void copyOf(Blackhole blackhole) {
        String key = Integer.toString(random.nextInt(size));
        blackhole.consume(copyOf.get(key));
    }
}
 

Main.java:13: error: class Bench is public, should be declared in a file named Bench.java
public class Bench {
       ^
Main.java:3: error: package org.openjdk.jmh.annotations does not exist
import org.openjdk.jmh.annotations.Benchmark;
                                  ^
Main.java:4: error: package org.openjdk.jmh.annotations does not exist
import org.openjdk.jmh.annotations.BenchmarkMode;
                                  ^
Main.java:5: error: package org.openjdk.jmh.annotations does not exist
import org.openjdk.jmh.annotations.Fork;
                                  ^
Main.java:6: error: package org.openjdk.jmh.annotations does not exist
import org.openjdk.jmh.annotations.Mode;
                                  ^
Main.java:7: error: package org.openjdk.jmh.infra does not exist
import org.openjdk.jmh.infra.Blackhole;
                            ^
Main.java:34: error: cannot find symbol
    public void hash(Blackhole blackhole) {
                     ^
  symbol:   class Blackhole
  location: class Bench
Main.java:42: error: cannot find symbol
    public void copyOf(Blackhole blackhole) {
                       ^
  symbol:   class Blackhole
  location: class Bench
Main.java:31: error: cannot find symbol
    @Benchmark
     ^
  symbol:   class Benchmark
  location: class Bench
Main.java:32: error: cannot find symbol
    @Fork(value = 1, warmups = 1)
     ^
  symbol:   class Fork
  location: class Bench
Main.java:33: error: cannot find symbol
    @BenchmarkMode(Mode.Throughput)
     ^
  symbol:   class BenchmarkMode
  location: class Bench
Main.java:33: error: cannot find symbol
    @BenchmarkMode(Mode.Throughput)
                   ^
  symbol:   variable Mode
  location: class Bench
Main.java:39: error: cannot find symbol
    @Benchmark
     ^
  symbol:   class Benchmark
  location: class Bench
Main.java:40: error: cannot find symbol
    @Fork(value = 1, warmups = 1)
     ^
  symbol:   class Fork
  location: class Bench
Main.java:41: error: cannot find symbol
    @BenchmarkMode(Mode.Throughput)
     ^
  symbol:   class BenchmarkMode
  location: class Bench
Main.java:41: error: cannot find symbol
    @BenchmarkMode(Mode.Throughput)
                   ^
  symbol:   variable Mode
  location: class Bench
Main.java:15: error: package org.openjdk.jmh does not exist
        org.openjdk.jmh.Main.main(args);
                       ^
Main.java:20: error: cannot find symbol
    static final Map<String, String> copyOf = Map.copyOf(hashMap);
                                                         ^
  symbol:   variable hashMap
  location: class Bench
18 errors

Standard output is empty