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https://issues.apache.org/jira/browse/BEAM-5987?focusedWorklogId=185788&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-185788
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ASF GitHub Bot logged work on BEAM-5987:
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                Author: ASF GitHub Bot
            Created on: 16/Jan/19 14:08
            Start Date: 16/Jan/19 14:08
    Worklog Time Spent: 10m 
      Work Description: iemejia commented on issue #7091: [BEAM-5987] Spark: 
Share cached side inputs between tasks.
URL: https://github.com/apache/beam/pull/7091#issuecomment-454790500
 
 
   Spark Validates Runner
 
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Issue Time Tracking
-------------------

    Worklog Id:     (was: 185788)
    Time Spent: 4h 50m  (was: 4h 40m)

> Spark SideInputReader performance
> ---------------------------------
>
>                 Key: BEAM-5987
>                 URL: https://issues.apache.org/jira/browse/BEAM-5987
>             Project: Beam
>          Issue Type: Bug
>          Components: runner-spark
>    Affects Versions: 2.8.0
>            Reporter: David Moravek
>            Assignee: David Moravek
>            Priority: Major
>             Fix For: 2.9.0
>
>         Attachments: Screen Shot 2018-11-06 at 13.05.36.png
>
>          Time Spent: 4h 50m
>  Remaining Estimate: 0h
>
> We did some profiling of a spark job and 90% of the application time was 
> spent on side input deserialization.
> For spark, an easy fix is to cache materialized side inputs per bundle. This 
> improved running time of the profiled job from 3 hours to 30 minutes.



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