Simultaneous Calculations

Is it possible to make simultaneous calculations through an array? For example, lets assume we have a 2d array of floats and want to know the sum of all elements in a column for all columns. Is there a way to calculate these sums simultaneously for all columns and not one by one?

One way I can think of for doing this is using the GPU multicore architecture to parallelize the calculations but is this feasible with processing?


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