houqp commented on pull request #7666:
URL: https://github.com/apache/arrow/pull/7666#issuecomment-656943172
+1 on unifying to Arc for the initial release given it's not on the hot
path. It's better to start simple and optimize later. Arc's atomic reference
counting tend to mess with compiler optimization and CPU cacheline, so it
definitely has extra runtime overhead. But it shouldn't matter for schema. If
get schema turned out to be on the hot path, then we have a bigger problem to
fix :P I can't think of any reason why that should be the case.
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