Generate Many Least Cost Paths (quickly)

Discussion created by gverutes on May 23, 2011
I am trying to generate least cost paths for water quality modeling.  I know how to generate a cost surface and utilize the various tools in Spatial Analyst to produce a cost path raster.  The problem is that I need to do this hundreds of times.   The write time for each path raster is about 5-10 secs x hundreds of outputs = too long.  Is there a way (perhaps through matrix overlays?) to generate quick cost paths in order to determine which cells that each least cost path traverses through?