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mailru / easyjson

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Optimization allocations during Unmarshal

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prateek
prateek commented Apr 27, 2020

Hey folks, thanks for a pretty bad ass library! I'm seeing a 3-3.3x gain when decoding fairly large JSON payloads (40-50MB) as compared stdlib/json-iterator.

Few things in the generated code that struck me as odd are the allocation sizes for slices/maps:

  • Slice is set to size 1 initially, values are appended using append
  • Map does not have a default size specified

Instead of this, I

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