[jira] [Commented] (SPARK-31967) Application timeline rendering takes 40 seconds

["Gengliang Wang (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SPARK-31967?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17133029#comment-17133029 ] 

Gengliang Wang commented on SPARK-31967:
----------------------------------------

[~sarutak] could you take a look at it? It is very serious.

> Application timeline rendering takes 40 seconds
> -----------------------------------------------
>
>                 Key: SPARK-31967
>                 URL: https://issues.apache.org/jira/browse/SPARK-31967
>             Project: Spark
>          Issue Type: Bug
>          Components: Web UI
>    Affects Versions: 3.0.1
>            Reporter: Gengliang Wang
>            Priority: Major
>         Attachments: load_time.jpeg, profile.png
>
>
> In the latest master branch, I find that the job list page becomes very slow.
> To reproduce in local setup:
> {code:java}
> spark.read.parquet("/tmp/p1").createOrReplaceTempView("t1")
> spark.read.parquet("/tmp/p2").createOrReplaceTempView("t2")
> (1 to 1000).map(_ =>  spark.sql("select * from t1, t2 where t1.value=t2.value").show())
> {code}
> And that, open live UI: http://localhost:4040/
> The loading time is about 40 seconds.
> If we comment out the function call for `drawApplicationTimeline`, then the loading time is around 1 second.



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