It seems to me that consistent allocation patterns would help more if JerryScript used reference counting for memory management, perhaps with mark-and-sweep GC

It seems to me that consistent allocation patterns would help more if JerryScript used reference counting for memory management, perhaps with mark-and-sweep GC as a backup to handle cycles. As it stands now, each object has a reference count to keep it alive while it's being used by C code via the API, but actual deallocation is done via mark-and-sweep GC.