code: def __exit__(self, *args):
      self.time = time.perf_counter() - self.start_time
      # the `Windows` case is tested, but not that
      # from which coverage is gathered which runs on ubuntu
      if platform.system() == "Windows":  # pragma: no cover
          return
      post_maxrss_bytes = resource.getrusage(
          resource.RUSAGE_SELF
      ).ru_maxrss
      self.increment = post_maxrss_bytes - self.pre_maxrss_bytes
  
imports: import platform
  import time
label_desc: Use image node_id 3 for calling the PerformanceTracker obj's underlying member method code with example usage: obj.__exit__() without return types