[magick-users] Question about performance of ImageMagick.

[duc.sequere.aut.de.via.decede at imagemagick.org]

> I'm doing very large say 15K pixels by 6K pixels bitmaps 

You are caching pixels to disk which is 1000 times slower than memory access.
To verify, add '-debug cache' to your command line.

The default ImageMagick build is Q16 at 16 bits per pixel.  Try the Q8
build and your image might fit into memory.

Add more memory to your computer or increase the swap area.

If you have a Window 64-bit OS, use the 64-bit ImageMagick distribution.  It
uses a larger address space and can fit larger images into memory than 
32-bit Windows.

Its always a good idea to use a modern version of ImageMagick.  The current
release is 6.4.3-6.