nitsanw

  public void meSoHotInline_avgt_jmhStub(InfraControl control, RawResults result,
      SafepointProfiling_jmhType l_safepointprofiling0_0, Blackhole_jmhType l_blackhole1_1) throws Throwable {
    long operations = 0;
    long realTime = 0;
    result.startTime = System.nanoTime();
    do {
      l_safepointprofiling0_0.meSoHotInline(); /* LINE 163 */
      operations++;
      // SP poll, uncounted loop
    } while (!control.isDone); /* LINE 165 */

nitsanw

  @Param("1000")
  int size;
  byte[] buffer;
  boolean result;

  @Setup
  public final void setup() {
    buffer = new byte[size];
  }

nitsanw

// 1. counted = reps is int/short/byte
for (int i = 0; i < reps; i++) {
  // You had plenty money, 1922
}

// 2. Not counted
for (int i = 0; i < int_reps; i+=2) {
  // You let other women make a fool of you
}

nitsanw

public class WhenWillItExitInt3 {
  public static void main(String[] argc) throws InterruptedException {
    for (int i=0;i<100000;i++) {
      countOdds(10);
    }
    Thread t = new Thread(() -> {
      long l = countOdds(Integer.MAX_VALUE);
      System.out.println("How Odd:" + l);
    });
    t.setDaemon(true);

nitsanw

  private static long countOdds(int limit) {
    long l = 0;
    for (int i = 0; i < limit; i++) {
      for (int j = 0; j < limit; j++) {
        if ((j & 1) == 1)
          l++;
      }
    }
    return l;
  }      

nitsanw

    ECLIPSE                   |     JAVAC
    int i = 0;                |     int i = 0;
    long l = 0;               |     long l = 0;
    int j;                    |     int j;
    goto LOOP_I;              |     LOOP_OUTER:          
    OUTER:                    |     if(i >= Integer.MAX_VALUE)
    j=0;                      |       goto EXIT_OUTER;           
    goto LOOP_J;              |               
                              |     j=0;
    INNER:                    |     LOOP_INNER:

nitsanw

   ECLIPSE                                    |   JAVAC  
   0: lconst_0                                |   0: lconst_0
   1: lstore_0                                |   1: lstore_0
   2: iconst_0                                |   2: iconst_0
   3: istore_2                                |   3: istore_2
                                              |
   4: goto          35                        |   4: iload_2
   7: iconst_0                                |   5: ldc           #11 // int 2147483647
   8: istore_3                                |   7: if_icmpge     41  // i >= INT_MAX goto 41  
   9: goto          26                        |  10: iconst_0          

nitsanw

package safepoint.hang;
public class WhenWillItExitInt {
  public static void main(String[] argc) throws InterruptedException {
    Thread t = new Thread(() -> {
      long l = 0;
      for (int i = 0; i < Integer.MAX_VALUE; i++) {
        for (int j = 0; j < Integer.MAX_VALUE; j++) {
          if ((j & 1) == 1)
            l++;
        }

nitsanw

  @Param({ "0" })
  int idleThreads;
  Thread[] pool;

  @Setup
  public final void bakeACake() {
    if (idleThreads != 0) {
      pool = new Thread[idleThreads];
      for (int i = 0; i < idleThreads; i++) {
        pool[i] = new Thread(() -> {

nitsanw

@State(Scope.Thread)
@BenchmarkMode(Mode.AverageTime)
@OutputTimeUnit(TimeUnit.NANOSECONDS)
public class ArrayWrapperInterfaceBenchmark {
  @Param({ "100", "1000", "10000" })
  public int size;
  private DataSet datasetA;
  private DataSet datasetB;

  private static final class DataSet {