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Posted to reviews@spark.apache.org by GitBox <gi...@apache.org> on 2021/02/03 18:43:17 UTC

[GitHub] [spark] WamBamBoozle commented on pull request #31162: [SPARK-34033][R] SparkR Daemon Initialization

WamBamBoozle commented on pull request #31162:
URL: https://github.com/apache/spark/pull/31162#issuecomment-772732386


   > I dont' know much about R - why does this help improve performance?
   
   It is like moving the invariant expression out of the loop. It is the difference between loading supporting libraries once vs loading them millions of times.
   
   It is described in detail in [docs/sparkr.md](https://github.com/WamBamBoozle/spark/blob/daemon_init/docs/sparkr.md#daemon-initialization)


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