[mapserver-users] Need help speeding up my image processing

[K]

I am using openlayers as my front end, mapserver to process my files to 
load as WMS layers.

I have a bunch of imagery I have divided up into different zoom levels. 
Two are just single images, both under 100kb in size.

Three are loaded via image catalog/index shape file, the top level has 
images of about 150kb in size, with about 8 images in view. Next level 
is around 2m in size, about 6 images in view. Lastly is about 3m in 
size, 4ish images in view.

Everything looks good, works well, it is just slow and there does not 
seem to be much difference in how long it takes to load the imagery at 
each scale, they are all similarly slow. I am thinking that means it is 
a process issue and I am probably doing something inefficient that is 
causing the slowness.

Here is my output setup from my map file:

   OUTPUTFORMAT
     NAME "png"
     MIMETYPE "image/png"
     DRIVER "GD/PNG"
     EXTENSION "png"
     IMAGEMODE RGB
     TRANSPARENT OFF
   END

Here is an example of my Layer:


   LAYER
     NAME "Imagery"
     STATUS ON
     TILEINDEX "1m3px/1m3px_imgcat.shp"
     TILEITEM "location"
     TYPE RASTER
     MAXSCALEDENOM 5000
     MINSCALEDENOM 2000
   END

How does this look? Any other info I can provide that would provide more 
clarity?

Thanks,

Ken