databricks-david-lewis opened a new pull request #25787: [SPARK-29081] Replace calls to SerializationUtils.clone on properties with a faster implementation URL: https://github.com/apache/spark/pull/25787 Replace use of SerializationUtils.clone with new Utils.cloneProperties method ### What changes were proposed in this pull request? I don't have empirical evidence that SerializationUtils.clone is a problem, but it is certainly over-kill. I see it often in stacktraces I take for debugging and want to get rid of it. ### Does this PR introduce any user-facing change? Strings are immutable so there is no reason to serialize and deserialize them, it just creates extra garbage. The only functionality that would be changed is the unsupported insertion of non-String objects into the spark local properties. ### How was this patch tested? <!-- If tests were added, say they were added here. Please make sure to add some test cases that check the changes thoroughly including negative and positive cases if possible. If it was tested in a way different from regular unit tests, please clarify how you tested step by step, ideally copy and paste-able, so that other reviewers can test and check, and descendants can verify in the future. If tests were not added, please describe why they were not added and/or why it was difficult to add. -->
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