Github user srowen commented on the issue:
https://github.com/apache/spark/pull/22893
Hm, actually that's the best case. You're exercising the case where the
code path you prefer is fast. And the case where the precision bound applies is
exactly the case where the branch you deleted helps. As I say, you'd have to
show this is not impacting other cases significantly, and I think it should.
Consider the sparse-sparse case.
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