you're potentially running into an issue with the sqlite3 backend.

if your distro allows it, try copying ~/.config/darktable/library.db
to /dev/shm and start

darktable --library /dev/shm/library.db

and copy it back after that. traditionally, in-ram access made sql run
a lot faster, if that doesn't solve your issue we might need another
index on the tags table (do you also have a lot of tags?).

j.

On Tue, Feb 19, 2013 at 2:36 PM, Warren Baird
<[email protected]> wrote:
> Hi all,
>
> I've started trying to use darktable 'for real' and have run into a fairly
> annoying issue.   The lighttable UI becomes really sluggish if I create a
> collection defined by taking a tag with a lot of matches, and then selecting
> "Exclude Images" and selecting a tag that matches a small number of images.
>
> I've tried this with a collection of about 7500 images, and an 'exclude' tag
> that matches about 300 of them - and another collection of about 1100
> images, and an exclude tag of maybe 200 or so images.
>
> In both cases the general UI response gets very slow - the highlight lags
> about a second behind mouse movements, and scrolling gets very slow.
>
> if I select 'clear this rule' on the exluded tag, the performance gets a
> *lot* better.
>
> I often want to scan through a relatively large # of images looking for
> things that might work for a particular art project - but I usually want to
> exclude any images that I've used in previous projects...
>
> Any suggestions on alternative ways to accomplish this, or how to speed this
> up would be great!
>
> Should I log a bug?
>
> best regards,
>
> Warren
>
>
> --
> Warren Baird - Photographer and Digital Artist
> http://www.synergisticimages.ca
>
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