What are the key differences between the Repa 2 and 3 APIs?

Question

To be more specific, I have the following innocuous-looking little Repa 3 program:

{-# LANGUAGE QuasiQuotes #-}

import Prelude hiding (map, zipWith)
import          


        

Answer 1

computeP is the new force.

In Repa 3 you need to use computeP everywhere you would have used force in Repa 2.

The Laplace example from repa-examples is similar to what you're doing. You should also use cmap instead of plain map in your blur function. There will be a paper explaining why on my homepage early next week.