Sampling process 689 for 3 seconds with 1 millisecond of run time between samples
Sampling completed, processing symbols...
Analysis of sampling calculatorform (pid 689) every 1 millisecond
Call graph:
    2633 Thread_1767315   DispatchQueue_1: com.apple.main-thread  (serial)
      2633 start
        2633 _start
          2633 main
            2633 QCoreApplication::exec()
              2633 QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>)
                2633 QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)
                  2633 QEventDispatcherMac::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)
                    2633 -[NSApplication run]
                      2633 -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:]
                        2633 _DPSNextEvent
                          2633 BlockUntilNextEventMatchingListInMode
                            2633 ReceiveNextEventCommon
                              2633 RunCurrentEventLoopInMode
                                2633 CFRunLoopRunInMode
                                  2633 CFRunLoopRunSpecific
                                    2633 __CFRunLoopRun
                                      2627 mach_msg
                                        2627 mach_msg_trap
                                      1 QEventDispatcherMacPrivate::activateTimer(__CFRunLoopTimer*, void*)
                                        1 qt_sendSpontaneousEvent(QObject*, QEvent*)
                                          1 QCoreApplication::notifyInternal(QObject*, QEvent*)
                                      1 __CFRunLoopDoObservers
                                        1 CFSetGetValues
                                          1 CFBasicHashGetElements
                                      1 __CFRunLoopDoSources0
                                      1 __CFRunLoopModeFindSourceForMachPort
                                        1 CFDictionaryGetValue
                                          1 CFBasicHashFindBucket
                                            1 ___CFBasicHashFindBucket1
                                      1 __CFRunLoopTimerRescheduleWithAllModes
                                        1 mk_timer_arm
                                      1 mach_port_extract_member
                                        1 mach_msg
                                          1 mach_msg_trap
    2633 Thread_1767349   DispatchQueue_2: com.apple.libdispatch-manager  (serial)
      2633 start_wqthread
        2633 _pthread_wqthread
          2633 _dispatch_worker_thread2
            2633 _dispatch_queue_invoke
              2633 _dispatch_mgr_invoke
                2633 kevent

Total number in stack (recursive counted multiple, when >=5):

Sort by top of stack, same collapsed (when >= 5):
        kevent        2633
        mach_msg_trap        2628
Sample analysis of process 689 written to file /dev/stdout