APPLICATIONS OF OVERLOOKING ROOT INFORMATION FOR IMPROVING NONDEFERRED REFERENCE-COUNTING GARBAGE COLLECTION

摘要

A reference-counting garbage collection system utilizing overlooking roots injects eager reference-counting updates into the program. An overlooking roots reference-counting subsumption optimization tool identifies redundant reference-counting updates and removes them, lowering the number of reference-counting update calls and improving execution throughput. The optimization tool also includes new overlooking root relationships in order to permit other unnecessary reference-counting updates to be removed during optimization. Reference-counting updates which are specialized based on the overlooking root information are also included in the program.