code: def _verify_speed(
      self,
      time_sp: float,
      time_mp: float,
      min_speedup_ratio: float = 0.9,
  ):
      self.assertLessEqual(time_mp, time_sp * min_speedup_ratio)
  
file_path: vizseq/tests/scorers/__init__.py
imports: import unittest
  import time
  import os
  from typing import Union, List, Optional, Type, Dict
  from vizseq.scorers import VizSeqScorer, VizSeqScore
label_desc: Use image node_id 2 for calling the VizSeqScorerTestCase obj's underlying member method code with example usage: obj._verify_speed(time_sp, time_mp, min_speedup_ratio) without return types