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Message: [QUOTE="Mark Space, post: 3483698"] I've seen an article or white paper on this, I think from Sun. They said to put all references in a regular old Map (HashMap, etc.), then use one weak or soft reference to the map itself. SoftReference cache = new SoftReference( new HashMap() ); Then, when the GC needs to collect this, it sees one soft reference, frees that, and then can automatically free everything in the hash map without any more checking or involved processing. It's much much lighter on the GC than using a weak hash map, which makes the GC check every single weak reference. I'll try to find that article, I don't see it right now.... [/QUOTE]