Package util

Examples of util.StopWatch.start()

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      @Override
      public void run() {
        try {
          final int loop = 100;
          final StopWatch timer = new StopWatch();
          timer.start();
          for (int k = 0; k < loop; k++) {
            for (int index = Byte.MIN_VALUE; index <= Byte.MAX_VALUE; index++) {
              streamOut.write(index);
            }
            for (int index = Byte.MIN_VALUE; index <= Byte.MAX_VALUE; index++) {
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        final int size = 1000;
        final byte[] arrayOut = new byte[size];
        final byte[] arrayIn = new byte[size];
        try {
          final StopWatch timer = new StopWatch();
          timer.start();
          for (int k = 0; k < loop; k++) {
            random.nextBytes(arrayOut);
            streamOut.write(arrayOut);
            final int count = streamIn.read(arrayIn);
            assertEquals(count, size);
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        final int size = 100;
        final byte[] arrayOut = new byte[size];
        final byte[] arrayIn = new byte[size];
        try {
          final StopWatch timer = new StopWatch();
          timer.start();
          for (int k = 0; k < loop; k++) {
            random.nextBytes(arrayOut);
            streamOut.write(arrayOut);
            final int count = streamIn.read(arrayIn);
            assertEquals(count, size);
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    log.info("### JAVA ###");

    long nanos;
    final StopWatch timer = new StopWatch();

    timer.start();
    for (int k = 0; k < COUNT; k++) {
      // baseline
    }
    timer.stop();
    nanos = timer.nanoTime() / COUNT;
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    }
    timer.stop();
    nanos = timer.nanoTime() / COUNT;
    log.info("baseline nanos={}", nanos);

    timer.start();
    for (int k = 0; k < COUNT; k++) {
      // small array
      final byte[] array = new byte[128];
    }
    timer.stop();
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    }
    timer.stop();
    nanos = timer.nanoTime() / COUNT;
    log.info("make array 123; nanos={}", nanos);

    timer.start();
    for (int k = 0; k < COUNT; k++) {
      // medium array
      final byte[] array = new byte[1024];
    }
    timer.stop();
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    timer.stop();
    nanos = timer.nanoTime() / COUNT;
    log.info("make array 1024; nanos={}", nanos);

    final int[] arrayInt = new int[SIZE];
    timer.start();
    for (int k = 0; k < COUNT; k++) {
      Arrays.fill(arrayInt, 1235678);
    }
    timer.stop();
    nanos = timer.nanoTime() / COUNT / SIZE;
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    log.info("fill array; nanos={}", nanos);

    //

    final Integer[] array = new Integer[1024];
    timer.start();
    for (int k = 0; k < COUNT; k++) {
      for (final Integer i : array) {
        // iterate array
        final Integer x = i;
      }
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    final Set<Integer> set = new HashSet<Integer>();
    for (int k = 0; k < 1024; k++) {
      set.add(k);
    }
    //
    timer.start();
    for (int k = 0; k < COUNT; k++) {
      for (final Integer i : set) {
        // iterate set
        final Integer x = i;
      }
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    }
    timer.stop();
    nanos = timer.nanoTime() / COUNT / 1024;
    log.info("iterate set; nanos={}", nanos);
    //
    timer.start();
    for (int k = 0; k < COUNT; k++) {
      final Object[] x = set.toArray();
    }
    timer.stop();
    nanos = timer.nanoTime() / COUNT;
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