class_docstr: TimeProfiler to record the event and timestamp.
code: def record(self, uid, event):
      if not self._enable:
          return
      timestamp = int(round(time.time() * 1000000))
      self._time_record.append(f"{uid}::{event}::{timestamp}")
  
file_path: towhee/towhee/runtime/time_profiler.py
imports: import time
label_desc: Use image node_id 2 for calling the TimeProfiler obj's underlying member method code with example usage: obj.record(uid, event) without return types