Was it this one? https://www.cs.virginia.edu/~cs415/reading/bacon-garbage.pdf https://www.cs.virginia.edu/~cs415/reading/bacon-garbage.pdf Tracing and referenc

Was it this one? https://www.cs.virginia.edu/~cs415/reading/bacon-garbage.pdf https://www.cs.virginia.edu/~cs415/reading/bacon-garbage.pdf Tracing and reference counting are two GC approaches that the paper shows are dual in some interesting ways and can have similar characteristic -- when both are sophisticated enough.