Github user rdblue commented on the issue:
https://github.com/apache/spark/pull/21071
@devaraj-kavali, do you have any measurements to quantify how this impacts
overall performance? We would want to know before releasing this for use
because using HTrace means having it on all the time to be able to analyze
slow-downs. Like @steveloughran suggests, it should also be optional (unless
there is no measurable cost to having it on all the time).
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