Before revision:  On the basis of BOPS, also we propose a new roofline performance model for DC computing . Through the experiments, we demonstrate that our new metrics--BOPS, measuring tool, and new performance modelindeed facilitate DC computer system design and optimization .
After revision:  On the basis of BOPS, also we propose a new roofline performance model for DC computing , which we call DC-Roofline model, with which we optimize DC workloads with the improvement varying from 119\% to 325\% .