class_docstr: Register the running time of a context.
code: def __exit__(self, type, value, traceback):
      self.elapsed = time.perf_counter() - self.start
  
file_path: thinc/examples/benchmarks/mappers.py
imports: from thinc.api import remap_ids_v2
  from thinc.api import premap_ids
  from thinc.api import chain, Embed, HashEmbed
  import time
  import random
  import numpy
  import cupy
label_desc: Use image node_id 2 for calling the time_context obj's underlying member method code with example usage: obj.__exit__(type, value, traceback) without return types