JsonPerformanceTest.java

package org.glassfish.json;

import java.io.IOException;
import java.io.StringReader;
import java.nio.file.FileSystems;
import java.nio.file.Files;
import java.nio.file.Path;

import javax.json.JsonObject;
import javax.json.JsonReader;

import junit.framework.TestCase;

public class JsonPerformanceTest extends TestCase {

    private static final int TIMES = 1000 * 1000;
    
    public static JsonObject object;

    public void testMuchosThreads() throws IOException, InterruptedException {
        int numberOfCores = Runtime.getRuntime().availableProcessors();
        int factor = 3; // Initially 1
        int numberOfThreads = factor * numberOfCores;

        long time = System.currentTimeMillis();
        ReadStrings[] threads = new ReadStrings[numberOfThreads];
        for (int i = 0; i < numberOfThreads; i++) {
            threads[i] = new ReadStrings();
            threads[i].start();
        }

        for (int i = 0; i < numberOfThreads; i++) {
            threads[i].join();
        }
        long taken = System.currentTimeMillis() - time;
        System.out.println(taken);
        System.err.println(object.hashCode());
    }

    class ReadStrings extends Thread {
        @Override
        public void run() {
            Path path = FileSystems.getDefault().getPath(".", "src/test/resources/other-file.json");
            String someJson;
            try {
                someJson = new String(Files.readAllBytes(path));
                for (int i = 0; i < TIMES; i++) {
                    JsonReader reader = new JsonReader(new StringReader(someJson));
                    object = reader.readObject();
                    reader.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

}