svoid monitorThreadAllocatedMemory() {
  ThreadMXBean bean = threadMXBean();
  
  if (bean instanceof com.sun.management.ThreadMXBean &&
    ((com.sun.management.ThreadMXBean) bean).isThreadAllocatedMemorySupported())
      ((com.sun.management.ThreadMXBean) bean).setThreadAllocatedMemoryEnabled(true);
}