why is the "Calculation Locations" function of Network Analyst so slow?

Discussion created by haihai027 on Jun 1, 2010
Latest reply on Jun 1, 2010 by mrice-esristaff
Hello everyone,

I was using the Network Analyst to generate a OD Matrix for 4388 origin points and 6000 destination points in ArcGIS 9.3 but found that loading either origin points or destination points took toooo much time. So, I switched to the Calculation Locations menu of GP toolbox for a faster speed. I also divided the points to many groups so that each group will only contain 100 points. But the result was still the same: to calculate the location for a single point took about 15 minutes. Does anybody know the reason?

Thanks in advance!