StopWatch - Why is my app so slow ??? (See related posts)

import java.util.Hashtable;

public class StopWatch {
    private static final Hashtable startTime = new Hashtable();
    
    public static void start(String id){
        startTime.put(id,new Long(System.currentTimeMillis()));
    }

    public static long stop(String id){
        return System.currentTimeMillis() - ((Long)startTime.remove(id)).longValue();
    }
}

public main(String[] args) {
    // Start a global stopwatch
    StopWatch.start("GLOBAL");

    // evaluate time used by task 1
    StopWatch.start("TASK1");
    executeTask1();
    System.out.println("Time elapsed for task 1 : " + StopWatch.stop("TASK1") + "ms";

    // evaluate time used by task 2
    StopWatch.start("TASK2");
    executeTask2();
    System.out.println("Time elapsed for task 2 : " + StopWatch.stop("TASK2") + "ms";

    // Display time elapsed for full processing
    System.out.println("Total processing time : " + StopWatch.stop("GLOBAL") + "ms";
}