code: def computePerf(self):
      self.mARFitPerf = tsperf.cPerf()
      self.mARForecastPerf = tsperf.cPerf()
      (lFrameFit, lFrameForecast, lFrameTest) = self.mSplit.cutFrame(
          self.mARFrame
      )
      self.mARFitPerf.compute(
          lFrameFit[self.mCycleResidueName],
          lFrameFit[self.mOutName],
          self.mOutName,
      )
      self.mARForecastPerf.compute(
          lFrameForecast[self.mCycleResidueName],
          lFrameForecast[self.mOutName],
          self.mOutName,
      )
  
imports: import pandas
  import numpy
  from .None import Time
  from .None import Perf
  from .None import Plots
  from .None import Utils
  import time
label_desc: Use image node_id 4 for calling the cAbstractAR obj's underlying member method code with example usage: obj.computePerf() without return types