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https://issues.apache.org/jira/browse/MRESOLVER-7?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17570922#comment-17570922
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ASF GitHub Bot commented on MRESOLVER-7:
----------------------------------------
caiwei-ebay commented on code in PR #178:
URL: https://github.com/apache/maven-resolver/pull/178#discussion_r928932146
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maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/collect/bf/BfDependencyCollector.java:
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@@ -365,6 +477,64 @@ else if ( descriptorResult == DataPool.NO_DESCRIPTOR )
return descriptorResult;
}
+ static class ParallelDescriptorResolver
+ {
+ final ExecutorService executorService;
Review Comment:
@michael-o
Thanks for the advice. Agreed we should reuse the executor service.
The BfDependencyCollector calls DefaultArtifactsResolver and the latter then
calls (Basic)RepositoryConnector.
Do you mean we should make BfDependencyCollector calls RepositoryConnector's
**get(artifactDownloads, metadataDownloads)** to download poms? or simply make
the **getExecutor** method as public and then make BfDependencyCollector call
the **getExcutor** to reuse the executor service. Please help clarify.
> Download dependency POMs in parallel
> ------------------------------------
>
> Key: MRESOLVER-7
> URL: https://issues.apache.org/jira/browse/MRESOLVER-7
> Project: Maven Resolver
> Issue Type: Improvement
> Components: Resolver
> Affects Versions: Aether 1.0.2
> Reporter: Harald Wellmann
> Priority: Major
> Attachments: resolver.log
>
> Time Spent: 40m
> Remaining Estimate: 0h
>
> 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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