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From "Guoqiang Li (JIRA)" <j...@apache.org>
Subject [jira] [Created] (SPARK-17930) The SerializerInstance instance used when deserializing a TaskResult is not reused
Date Fri, 14 Oct 2016 03:26:20 GMT
Guoqiang Li created SPARK-17930:
-----------------------------------

             Summary: The SerializerInstance instance used when deserializing a TaskResult
is not reused 
                 Key: SPARK-17930
                 URL: https://issues.apache.org/jira/browse/SPARK-17930
             Project: Spark
          Issue Type: Improvement
          Components: Spark Core
    Affects Versions: 2.0.1, 1.6.1
            Reporter: Guoqiang Li


The following code is called when the DirectTaskResult instance is deserialized

{noformat}
  def value(): T = {
    if (valueObjectDeserialized) {
      valueObject
    } else {
      // Each deserialization creates a new instance of SerializerInstance, which is very
time-consuming
      val resultSer = SparkEnv.get.serializer.newInstance()
      valueObject = resultSer.deserialize(valueBytes)
      valueObjectDeserialized = true
      valueObject
    }
  }
{noformat}



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