apangin

/*
 * Copyright The async-profiler authors
 * SPDX-License-Identifier: Apache-2.0
 */

import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.concurrent.ThreadLocalRandom;
import java.util.stream.Stream;

apangin

/*
 * Copyright Andrei Pangin
 * SPDX-License-Identifier: Apache-2.0
 */

import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.Map;

/**

apangin

public static int hash(String... args) {
    if (args != null) {
        switch (args.length) {
            case 1:
                return 31 + Objects.hashCode(args[0]);
            case 2:
                return 961 + Objects.hashCode(args[0]) * 31 + args[1].hashCode();
            case 3:
                return 29791 + Objects.hashCode(args[0]) * 961 + args[1].hashCode() * 31 + args[2].hashCode();
        }

apangin

import java.io.Serializable;
import java.util.concurrent.atomic.LongAdder;

public class ReaderThread extends Thread {
    private static final LongAdder ops = new LongAdder();

    interface Reader extends Serializable {
        boolean advanceTo(int docId);
    }

apangin

package bench;

import com.auth0.jwt.JWT;
import com.auth0.jwt.JWTCreator;
import com.auth0.jwt.algorithms.Algorithm;
import org.openjdk.jmh.annotations.Benchmark;

import java.util.HashMap;

public class JwtToken {

apangin

import sun.misc.Unsafe;

import java.io.IOException;
import java.lang.reflect.Field;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.channels.FileChannel;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.ArrayList;

apangin

package bench;

import org.openjdk.jmh.annotations.Benchmark;
import org.openjdk.jmh.annotations.Param;
import org.openjdk.jmh.annotations.Scope;
import org.openjdk.jmh.annotations.Setup;
import org.openjdk.jmh.annotations.State;

import java.util.Arrays;
import java.util.concurrent.ThreadLocalRandom;

apangin

package bench;

import org.openjdk.jmh.annotations.Benchmark;
import org.openjdk.jmh.annotations.Param;
import org.openjdk.jmh.annotations.Scope;
import org.openjdk.jmh.annotations.Setup;
import org.openjdk.jmh.annotations.State;

import java.util.HashMap;
import java.util.Map;

apangin

import java.util.Comparator;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.stream.Collectors;
import java.util.stream.IntStream;

// See https://twitter.com/tagir_valeev/status/1402089474805354499
public class StringBuilderHash {

apangin

import java.util.ArrayList;
import java.util.concurrent.locks.LockSupport;
import java.util.stream.StreamSupport;

public class ParallelStream {

    public static int[] process(Iterable<Integer> iterable) {
        return StreamSupport.stream(iterable.spliterator(), true)
                .mapToInt(i -> {
                    LockSupport.parkNanos(1_000_000);