PySpark Data Serialization: Why Python UDFs Are Slow
Spark runs on the JVM. Python UDFs do not. Every row has to be converted between the two — and here is what that costs, how to spot it, and how to fix it.
Read MoreSpark runs on the JVM. Python UDFs do not. Every row has to be converted between the two — and here is what that costs, how to spot it, and how to fix it.
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