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Posted to issues@spark.apache.org by "Josh Rosen (JIRA)" <ji...@apache.org> on 2015/07/28 08:26:04 UTC
[jira] [Updated] (SPARK-9399) Assorted micro-optimizations in
PythonRDD
[ https://issues.apache.org/jira/browse/SPARK-9399?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Josh Rosen updated SPARK-9399:
------------------------------
Description:
There are a few minor optimizations in PythonRDD which may avoid garbage creation or Scala overheads:
- Replace a foreach() loop with a while() loop.
- Returns nulls instead of Options to avoid calling `Option.apply()` and `Option.isDefined` once per read() call.
- Call .size() instead of .length(), thereby avoiding an implicit Java -> Scala collections conversion.
was:
There are a few minor optimizations in PythonRDD which may avoid garbage creation or Scala overheads:
- Replace a foreach() loop with a while() loop.
- Returns nulls instead of Options to avoid allocating an Option once per read() call.
- Call .size() instead of .length(), thereby avoiding an implicit Java -> Scala collections conversion.
> Assorted micro-optimizations in PythonRDD
> -----------------------------------------
>
> Key: SPARK-9399
> URL: https://issues.apache.org/jira/browse/SPARK-9399
> Project: Spark
> Issue Type: Improvement
> Components: PySpark
> Reporter: Josh Rosen
> Assignee: Josh Rosen
> Priority: Minor
>
> There are a few minor optimizations in PythonRDD which may avoid garbage creation or Scala overheads:
> - Replace a foreach() loop with a while() loop.
> - Returns nulls instead of Options to avoid calling `Option.apply()` and `Option.isDefined` once per read() call.
> - Call .size() instead of .length(), thereby avoiding an implicit Java -> Scala collections conversion.
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