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https://issues.apache.org/jira/browse/CASSANDRA-18017?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17735999#comment-17735999
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Jacek Lewandowski commented on CASSANDRA-18017:
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It is 0 impact only if you rely on CI only. Similarly, you could forget to try 
compiling the project before pushing. If you frequently rerun stuff locally, it 
is definitely not zero impact. Also, Eclipse-Warnings is currently not run 
automatically, which can result in a surprise of the same kind. 

It would probably be more efficient to implement running checks as a pre-push 
git hook and actually run the checks against modified files only, assuming we 
can somehow determine the base branch. 

> 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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