> I'm having problems in using Imagemagick to rotate some tiff images.
> I'm using this command: mogrify -monitor -rotate -90 0088.tif
>
> It's taking about 4 hours for a few images like this one:
> 
> $ identify 0088.tif
> 0088.tif TIFF 15597x8864, 435kb 2.710u 0:14

Have you tried using the -limit option to give imagemagick more room to
play?
Snipped from the docs:
-limit <type> <value> 
Area, Disk, File, Map, or Memory resource limit 

Alternatively, for images that big, you might get more mileage out of an
alternative called VIPS, for which there is a front-end called nip2.

http://www.vips.ecs.soton.ac.uk/index.php?title=VIPS
(also available in Debian/Ubuntu repositories, and likely others too)

It's a little tricky to get used to, but lets you define operations that
are processed in chunks off the disk.  It is designed to handle images
larger than available memory.  I find it invaluable for large panoramic
photo work.

- Roger
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