Re: [I] sum_int: use arrow sum kernels and collapse integer type dispatch [datafusion-comet]

["andygrove (via GitHub)" <gi...@apache.org>]

andygrove commented on issue #5098:
URL: https://github.com/apache/datafusion-comet/issues/5098#issuecomment-5870671363

   The arrow sum kernel route was benchmarked above at 75-322% slower for narrow integer inputs, because it has to materialize a widened Int64Array per batch, and it is neutral for Int64, so it is not worth doing. I think we can close this as not planned; a zero-allocation widening loop or a dispatch cleanup that keeps the per-width loops can be a separate issue.
   


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