Re: [boost] [MultiIndex] Memory consumption of ordered indices

Subject: Re: [boost] [MultiIndex] Memory consumption of ordered indices
From: Joaquin M Lopez Munoz (joaquin_at_[hidden])
Date: 2015-02-21 03:53:03

Olaf van der Spek <ml <at> vdspek.org> writes:

> 
> On Fri, Feb 20, 2015 at 3:01 PM, Joaquin M Lopez Munoz
> <joaquin <at> tid.es> wrote:
> >
> > The overhead (on most platforms) is three pointers per node (and index):
> >
> > http://stackoverflow.com/a/4208349/213114
> >
> > Color is usually embedded into one of the pointers:
> >
> > http://bannalia.blogspot.com/2008/11/
> > optimizing-red-black-tree-color-bits.html
> 
> And for sequenced?

Two pointers per node.

> [...]
> > What's a "write-only" structure supposed to be useful for? [...]
> 
> The data structure is filled once (data read from DB) and then
> queried lots.

I'd say "read only" is a more common name fo this usage pattern.

> Perhaps a flat_map would be better suited.

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