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https://issues.apache.org/jira/browse/LUCENE-9861?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17306540#comment-17306540
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Uwe Schindler commented on LUCENE-9861:
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Yes, especially also renderJavadoc should use the better JVM options.
RenderJavadoc can't be in-process, as javadoc calls System.exit().
But for stuff that works perfectly fine in the Gradle JVM, disabling forking
also helps because it can run for very long time do class loading cost goes
away, optimizer can optimize and Gradle daemon can keep it alive.
> speed up precommit
> ------------------
>
> Key: LUCENE-9861
> URL: https://issues.apache.org/jira/browse/LUCENE-9861
> Project: Lucene - Core
> Issue Type: Task
> Reporter: Robert Muir
> Priority: Major
> Attachments: LUCENE-9861_hack.patch
>
>
> A lot of the java tools for precommit aren't being called in efficient ways
> (compilation, linting, etc).
> For example ecjlint, it runs very slow:
> {noformat}
> Aggregate task times (possibly running in parallel!):
> 271.73 sec. ecjLintMain
> 270.18 sec. ecjLintTest
> 227.17 sec. compileJava
> 12.07 sec. compileTestJava
> 1.21 sec. processResources
> 0.18 sec. clean
> {noformat}
> Simplying adding a couple reasonable jvm arguments to the ecj linter
> ({{jvmArgs = [ '-XX:+UseParallelGC', '-XX:TieredStopAtLevel=1' ]}}) speeds it
> up significantly.
> Speedup for ecjLint is 3x for me:
> {noformat}
> Aggregate task times (possibly running in parallel!):
> 163.38 sec. compileJava
> 84.57 sec. ecjLintMain
> 83.12 sec. ecjLintTest
> 6.11 sec. compileTestJava
> 0.95 sec. processResources
> 0.15 sec. clean
> {noformat}
> I imagine same may be true for a lot of these tasks. We're currently tossing
> default jvm args at these short-lived subprocesses, which is very suboptimal.
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