class_docstr: An obscure object encompassing timing results recorded by
  :func:`~cupyx.profiler.benchmark`. Simple statistics can be obtained by
  converting an instance of this class to a string.
  
  .. warning::
      This API is currently experimental and subject to change in future
      releases.
code: def __str__(self):
      return self.to_str(show_gpu=True)
  
file_path: cupy/cupyx/profiler/_time.py
imports: import math
  import time
  import numpy
  import cupy
  from cupy_backends.cuda.api import runtime
label_desc: Use image node_id 7 for calling the _PerfCaseResult obj's underlying member method code with example usage: obj.__str__() and returns: self