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https://issues.apache.org/jira/browse/CASSANDRA-18017?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17736002#comment-17736002
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Berenguer Blasi commented on CASSANDRA-18017:
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bq. If you frequently rerun stuff locally, it is definitely not zero impact

Are we talking the same thing? Did you notice the recently merged 
CASSANDRA-18588 does exactly that? it runs checkstyle only against modified 
files and then it takes no time at all.

> Jenkins: Consider using the no-build-test flag
> ----------------------------------------------
>
>                 Key: CASSANDRA-18017
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-18017
>             Project: Cassandra
>          Issue Type: Task
>          Components: CI
>            Reporter: Andres de la Peña
>            Assignee: Maxim Muzafarov
>            Priority: Normal
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> CASSANDRA-16625 and CASSANDRA-18000 added a {{-Dno-build-test=true}} flag to 
> skip the dependencies of the Ant test targets. This is useful to speed up the 
> test targets if the {{build-test}} target has already been previously run, 
> for example as part of {{{}ant jar{}}}.
> That was created thinking mainly on CircleCI's multiplexer, where we run the 
> same test target repeatedly. Skipping the already run depended on targets can 
> significantly speed up the tests. The flag however is also useful for all 
> other test jobs because every parallel runner can skip the test building 
> step, and we have hundreds of parallel runners. Saving around 30s on every 
> runner adds up considerable savings.
> Maybe this flag can also be used for skipping test builds on Jenkins too, so 
> each parallel test split can benefit from a slight boost. That could be done 
> if either {{build-test}} or {{jar}} have already been run before calling the 
> test target. I'm not familiarized with Jenkins config so I'm not sure whether 
> it makes sense.



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