Analysis of sampling ruby (pid 45977) every 1 millisecond
Call graph:
    889 Thread_9986471   DispatchQueue_1: com.apple.main-thread  (serial)
      889 start
        889 main
          889 ruby_run
            889 ruby_exec
              889 ruby_exec_internal
                889 rb_eval
                  889 rb_call
                    889 rb_call0
                      889 rb_require_safe
                        889 dln_load
                          889 NSLinkModule
                            889 NSLinkModule
                              889 dyld::link(ImageLoader*, bool, ImageLoader::RPathChain const&)
                                889 ImageLoader::link(ImageLoader::LinkContext const&, bool, bool, ImageLoader::RPathChain const&)
                                  889 dyld::notifyBatchPartial(dyld_image_states, bool, char const* (*)(dyld_image_states, unsigned int, dyld_image_info const*))
                                    889 map_images
                                      889 map_images_nolock
                                        889 _read_images
                                          889 dlclose
                                            889 dlclose
                                              889 dyld::garbageCollectImages()
                                                889 dyld::removeImage(ImageLoader*)
                                                  889 unmap_image
                                                    889 pthread_mutex_lock
                                                      889 semaphore_wait_signal_trap

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

Sort by top of stack, same collapsed (when >= 5):
        semaphore_wait_signal_trap        889