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https://issues.apache.org/jira/browse/JENA-1407?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16220402#comment-16220402
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Rob Vesse commented on JENA-1407:
---------------------------------

Skipped tests are and artefacts of the implementation of the test suite. 
Various abstract classes are used to provide a common set of tests across 
different input and output formats. Due to variations in feature support across 
the different formats some of them Will need to be skipped if the feature being 
tested is unsupported.

I guess it could be heap size effects? Some of the tests generate relatively 
large data which depending on the format is held fully in memory in some form 
or another e.g. JSON-LD. This could be causing a certain degree of garbage 
collection thrashing?

Could we try enabling parallel testing for that module?

> Improvements to build/test time of Elephas tests.
> -------------------------------------------------
>
>                 Key: JENA-1407
>                 URL: https://issues.apache.org/jira/browse/JENA-1407
>             Project: Apache Jena
>          Issue Type: Improvement
>            Reporter: Andy Seaborne
>            Priority: Minor
>
> The Elephas test can take a significant proportion of the total build time.
> if this could be improved without lost of testing, development and release 
> work, building locally would be improved.



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