I'm not talking about cdr-coding, but simply the placement of regular 2-element cons cells and/or their contents next to each other in memory. This is often a

I'm not talking about cdr-coding, but simply the placement of regular 2-element cons cells and/or their contents next to each other in memory. This is often a "happy accident" side-effect when copying collectors fill their destination space based on the traversal order of heap objects. This of course applies to any connected chain of objects which can freely coexist in a GC space, not just cons cells.