[
https://issues.apache.org/jira/browse/SPARK-27660?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Holden Karau updated SPARK-27660:
---------------------------------
Comment: was deleted
(was: Which is the this an issue duplicate off?)
> Allow PySpark toLocalIterator to pre-fetch data
> -----------------------------------------------
>
> Key: SPARK-27660
> URL: https://issues.apache.org/jira/browse/SPARK-27660
> Project: Spark
> Issue Type: Improvement
> Components: PySpark
> Affects Versions: 3.0.0
> Reporter: Bryan Cutler
> Priority: Minor
>
> In SPARK-23961, data was no longer prefetched so that the local iterator
> could close cleanly in the case of not consuming all of the data. If the user
> intends to iterate over all elements, then prefetching data could bring back
> any lost performance. We would need to run some tests to see if the
> performance is worth it due to additional complexity and extra usage of
> memory. The option to prefetch could adding as a user conf, and it's possible
> this could improve the Scala toLocalIterator also.
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
---------------------------------------------------------------------
To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org
For additional commands, e-mail: issues-h...@spark.apache.org
