lenskit.logging.Stopwatch# class lenskit.logging.Stopwatch(start=True)# Timer class for recording elapsed wall time in operations. acc_time: float | None = None# start_time: float | None = None# stop_time: float | None = None# start()# stop()# elapsed(*, accumulated=True)# Get the elapsed time. Return type: float measure(accumulate=False)# Context manager to measure an item, optionally accumulating its time. Parameters: accumulate (bool) __str__()# __repr__()#