ASF GitHub Bot commented on MRESOLVER-7:

michael-o commented on issue #10: [MRESOLVER-7] Download dependency POMs in 
parallel v2
URL: https://github.com/apache/maven-resolver/pull/10#issuecomment-379543204
   @mikehearn What needs to be changed to make classes accesible for this PR? 
I'll change it.

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> Download dependency POMs in parallel
> ------------------------------------
>                 Key: MRESOLVER-7
>                 URL: https://issues.apache.org/jira/browse/MRESOLVER-7
>             Project: Maven Resolver
>          Issue Type: Improvement
>    Affects Versions: Aether 1.0.2
>            Reporter: Harald Wellmann
>            Priority: Major
> h3. Background
> When building a project with dependencies not yet available in the local 
> repository, I noticed that Maven 3.3.9/Aether 1.0.2 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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