Department of Computer Science and Technology, Tsinghua University, Beijing 100084, China;
Department of Computer Science and Technology, Tsinghua University, Beijing 100084, China;
Department of Computer Science and Technology, Tsinghua University, Beijing 100084, China;
Department of Computer Science and Technology, Tsinghua University, Beijing 100084, China;
garbage collection; class-based object management; mutator cache; lease protocol;