Chronos: caching is done after batching because batches can be the same between epochs (#4768)
Chronos: caching is done after batching because batches can be the same between epochs (#4768)


yangw1234/BigDL,intel-analytics/BigDL,yangw1234/BigDL,intel-analytics/BigDL,intel-analytics/BigDL,yangw1234/BigDL,intel-analytics/BigDL,yangw1234/BigDL