Why are immutable objecs loved by JVM's GC?

Question

I know the reason that JVM GC loves short-live object because it can be collected in minor GC. But why does JVM GC love immutable objects?

EDIT: Charlie Hunt says t

Answer 1

Thanks for the link..found it nice :)

From presentation : GC loves small immutable objects and short lived objects.

Edit:

Smaller objects have short memory footprint which means that after collection there will not be much overhead on memory compaction ( Memory compaction is slow for big object as they leave bigger memory holes after they get reclaimed by GC). And short lived objects are also good as they get collected in minor GC cycles.