Cyclic Reference Counting With Lazy Mark-Scan

摘要

this paper is much higher than the original one for cyclic reference counting with local mark-scan. More shared cells will now be claimed directly, without any need for mark-scan. The deletion of the last pointer to a shared cell will recycle it immediately, regardless of whether there is a reference to it on the queue. The queue will be left basically with pointers to cycles and pointers to green cells in the free-list or recycled. In this case again, our algorithm performs far better than the original one. In the best case, only one local mark-scan will be performed per cycle, instead of as many as the number of external references to a cycle, as before.