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euphoria-flink: optimize sort #106

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horkyada opened this issue Apr 25, 2017 · 0 comments
Open

euphoria-flink: optimize sort #106

horkyada opened this issue Apr 25, 2017 · 0 comments
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flink performance

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@horkyada
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horkyada commented Apr 25, 2017 •
edited

Sort consists of sorting elements by a composite key <Window, ExtractedObject>.
SortTranslator for flink executor relies on GenericTypeComparator for Window as well as for user defined extracted object which causes a huge performance overhead because of deserializing both objects on every compare.

  • we can define our custom TypeComparator for known windows, or just emit NormalizableKey instead of the window
  • however without knowing the extracted objects' type we are not able to tune the comparing of those objects
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@xitep @horkyada