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https://issues.apache.org/jira/browse/MNG-5896?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17626431#comment-17626431
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wei cai commented on MNG-5896:
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[~fbricon]
This parallel pom downloading happens in a brand new BF collector as of now. BF
collector is a combination of
[https://github.com/apache/maven-resolver/pull/158]
[https://github.com/apache/maven-resolver/pull/178]
It includes some performance improvements based on what we've done in our
company to speed up maven build. So far the BF and original DF algorithm
co-exists and the DF is still the default.
When maven 3.9.x ships with maven-resolver 1.9.0, then users can simply put a
[.mvn/maven.config|https://maven.apache.org/configure.html] within project root
with below content:
"-Daether.dependencyCollector.impl=bf" to enable these features:
* Skipper to skip unnecessary resolution
* Parallel descriptor files (pom, metadata.xml) downloading
Not sure what's the plan to make the BF as default one. I believe this JIRA can
be closed accordingly until BF becomes the default option.
> Download dependency POMs in parallel
> ------------------------------------
>
> Key: MNG-5896
> URL: https://issues.apache.org/jira/browse/MNG-5896
> Project: Maven
> Issue Type: Improvement
> Components: Dependencies
> Affects Versions: 3.3.3
> Reporter: Harald Wellmann
> Priority: Major
>
> h3. Background
> When building a project with dependencies not yet available in the local
> repository, I noticed that Maven 3.3.3 first downloads the dependency POMs
> _sequentially_ and then proceeds downloading the dependency JARs with up to 5
> threads _in parallel_.
> Due to this, when first building a project with a large number of
> dependencies, downloading a large number of small POMs may take a lot longer
> than downloading the much larger JARs, or even longer than building the
> project itself, especially when a repository manager is used which increases
> the download latency.
> h3. Enhancement
> Download POMs of (transitive) dependencies in parallel to significantly speed
> up initial builds of large projects.
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