David Lewis created SPARK-29081:
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Summary: Replace calls to SerializationUtils.clone on properties
with a faster implementation.
Key: SPARK-29081
URL: https://issues.apache.org/jira/browse/SPARK-29081
Project: Spark
Issue Type: Improvement
Components: Spark Core
Affects Versions: 2.4.4
Reporter: David Lewis
I don't have empirical evidence, but due to the sheer number of times I have
seen spark in the SerializationUtils.clone method in stack traces I've taken I
figured it could use some love.
This functionality was implemented to fix a bug where we were accidentally
modifying the properties man used by other threads. That solution was to use
SerializationUtils.clone, but that is not necessary. I suggest just creating a
new Properties object and iterating over the key-value pairs in the original
map and adding them one by one.
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