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by bunderbunder
2619 days ago
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A large percentage of Spark code is really just assembling lego blocks. The built-in blocks are themselves all written in Java or Scala, and the performance of the code that stacks them together is negligible. It's mainly when you start writing custom UDFs (IOW, fabricating your own lego blocks) that platform interop and the performance of your language of choice become a big deal. |
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