maropu commented on issue #27836: [SPARK-31009][SQL] Support json_object_keys function URL: https://github.com/apache/spark/pull/27836#issuecomment-601050280 > Do you know how much faster it is? >> json_object_keys gives better performance than map_keys+from_json. Has the @dongjoon-hyun comment above been already adderssed? If this func has performance benefits, I think its better to show the perf. numbers in the PR description.
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