A computer-implemented method is provided for deleting a given object from among a plurality of objects in an object-oriented programming language computing system which uses a Reference Count (RC) of each of the plurality of objects to check a liveness of the plurality of objects. The method includes decrementing, in a Reference Counts (RCs) decrement operation, RCs of objects referenced from the given object using one or more non-atomic operations in a transaction that utilizes a hardware transactional memory mechanism to accelerate the reference counts decrement operation.