code: public function stop()
      {
          if (!$this->isRunning()) {
              return;
          }
  
          $this->data["runtime"] += microtime(true) - $this->started;
          $this->data["realmem"] += memory_get_usage(true) - $this->data["realmem_start"];
          $this->data["emalloc"] += memory_get_usage() - $this->data["emalloc_start"];
  
          $this->started = 0;
          $this->running = false;
      }
docs: Stops the timer.
  
  @return void