time-series prediction INCREDIBLY slow! HELP

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I can't believe that the time-series algorithm is really as slow as it
seems to be for me, so I must be doing something wrong. I'm trying to
predict 24 weeks of weekly sales. I have created a model with 6 months
of weekly data. The processing of the model was fast (about 2 minutes)
so I was initially encouraged, but the prediction queries are WAY too
slow. It takes over 5 minutes (PER product) to calculate the
predictions. At this rate it would take 48 days to generate the
predictions, about since I have about 14000 products! And this is not on
a slow machine; it is on a three processor server with 12 GB ram.

Does this performance sound normal? Is time-series prediction not
intended to be used in this way? Are there any tips anyone knows about
that could DRASTICALLY improve performance?



Elmer Miller