Re: [boost] Boost Trie

From: chintan rao (chintanraoh_at_[hidden])
Date: 2008-03-24 23:11:43

On Tue, Mar 25, 2008 at 7:29 AM, Scott McMurray <me22.ca+boost_at_[hidden]>
wrote:

> On Mon, Mar 24, 2008 at 9:30 PM, chintan rao <chintanraoh_at_[hidden]>
> wrote:
> >
> >  PATRICIA Tries optimize space. I don't know about how much it improves
>  the
> >  time efficiency over normal tries as one could be using TST in it to
> >  conserve space. But as far i remember a person #boost channel reported
> some
> >  thing like 2x speed over std::map.
> >
>
> (I use PATRICIA to mean joining chains of nodes with only one outbound
> link.  Whether that's right not no, I don't know.)
>
> I expect the time efficiciency improvement isn't significant.  It's
> probably similar to the difference between iterating list and vector,
> in that the memory locality is better.  It's essential, as far as I'm
> concerned, though, to keep the node space overhead from getting
> excessive, particularly since it does not worsen the time costs.
>
> And that "person in #boost" was likely me.  I got roughly a 2x speed
> up for 2x the memory cost, in a non-generic, proof-of-concept
> tst-patricia-trie.

Must have been you. You had spoken about tst patricia trie.  :).

>
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