cost-distance matrix for multiple points

Question

I want to run a cost-distance analysis to calculate the shortest
distance without crossing land between all cells in a grid overlaid on a harbour. I've
made a cost raster with 50 m resolution and given all the land cells a
very high cost (10000) and the sea cells a cost of 1. I downloaded the
Cost-Distance Matrix tool from the ESRI website. It works fine for a
small test dataset of 3 points but chugs unbelievably slowly for my full
grid dataset of about 700 points. From the time it took to run the small
dataset I worked out it would take about 40 days to run the full set!! 
Any ideas how to speed it up?
Many thanks.

LucasNathan · Answer

Were you ever able to find a solution to this problem?  I am trying to do a similar analysis.  I drafted a python script to iterate through a list of points and calculate cost distance based on a cost raster, however it would take a long long time for it to generate what I need.