Re: [Evolution-hackers] Memory usage of CamelFolderSummary and CamelImapFolder

[Veerapuram Varadhan <vvaradhan novell com>]

On Thu, 2006-11-16 at 11:41 -0500, Joe Shaw wrote:
> Hi,
> 
> On Thu, 2006-11-16 at 16:13 +0100, Philip Van Hoof wrote:
> >   o. The CamelFolderSummary uses mmap. This significantly reduces memory
> >      usage because an mmap is on-demand paged.
> 
> Does the on-disk format of the CamelFolderSummary change much or at all?
> In reading a summary from disk with Beagle, the main problem we've found
> is that it is entirely unsearchable, because records within the file are
> of variable length and there is no end-of-record marker, which means
> that you can't open the file, seek to some random location, and expect
> to find where the next (or previous) message begins.  This means that
> any time the summary changes, we have to walk the whole thing over again
> to see changes.
> 
> There was some work a while back to do a "metasummary", which was
> essentially a summary of the summary for easier searching, but I'm not
> sure what the end result of that was, or if it's in 2.8 or newer.
> 
Yes, "meta-summary" implementation is available from 2.8.x.

V. Varadhan