[MNG-5896] Download dependency POMs in parallel

• Type: Improvement
• Status: Reopened
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 3.3.3
• Component/s: Dependencies
• Assignee: Unassigned
• Reporter: Harald Wellmann
• Created: 27/Sep/15 14:48
• Updated: 03/Jun/23 07:07

Description

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.

Enhancement

Download POMs of (transitive) dependencies in parallel to significantly speed up initial builds of large projects.

Issue Links

• is blocked by: MRESOLVER-7 Download dependency POMs in parallel in BF collector
• is blocked by: MNG-6110 Upgrade Aether to Maven Resolver
• is related to: MNG-7677 Maven 3.9.0 is ~10% slower than 3.8.7 in large multi-module builds
• is related to: MRESOLVER-324 Make the BF algorithm as the default option to speed up maven dependency resolution and downloading
• requires: MNG-6672 Upgrade Maven Resolver to 1.4.2