code: def elapsed(self):
      end = time.time()
      res = end - self.start
      self.start = end
      return res
  
file_path: stable-diffusion-webui/modules/timer.py
imports: import time
  import argparse
label_desc: Use image node_id 2 for calling the Timer obj's underlying member method code with example usage: obj.elapsed() and returns: res