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Posted to issues@spark.apache.org by "Davies Liu (JIRA)" <ji...@apache.org> on 2016/08/17 20:12:20 UTC

[jira] [Created] (SPARK-17115) Improve the performance of UnsafeProjection for wide table

Davies Liu created SPARK-17115:
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             Summary: Improve the performance of UnsafeProjection for wide table
                 Key: SPARK-17115
                 URL: https://issues.apache.org/jira/browse/SPARK-17115
             Project: Spark
          Issue Type: Bug
          Components: SQL
    Affects Versions: 2.0.0
            Reporter: Davies Liu
            Assignee: Davies Liu


We increase the threshold for splitting the generate code for expressions to 64K in 2.0 by accident (too optimistic), which could cause bad performance (the huge method may not be JITed), we should decrease that to 16K.



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