The current hash lookups are very fast -- possibly as fast as I could hope to get -- the problem I'm trying to address is the memory consumed by the duplication of keys & values.

As I said in the OP: "so the priority is the lookup speed -- preferably O(1) though O(logN) might be acceptable if the memory reduction was sufficient."

With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'
Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.

In reply to Re^2: Bidirectional lookup algorithm? (Updated: further info.) by BrowserUk
in thread Bidirectional lookup algorithm? (Updated: further info.) by BrowserUk

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