With Java, and any other VM that doesn't specify an exact GC algorithm, it always depends. IIRC the train algorithm used in some JVMs improves locality. Most G

With Java, and any other VM that doesn't specify an exact GC algorithm, it always depends. IIRC the train algorithm used in some JVMs improves locality. Most GCs use a pointer-bump scheme anyways, leading to pretty good locality for objects that have been created together. So yes, the JVM _may_ have some pretty cool mechanisms to minimize those. I would be also interested in G1s behavior and whether or not it improves locality somehow.