Coolio, kudos Sergey! My numbers are (OS name: "linux", version: "6.14.9-300.fc42.x86_64", arch: "amd64", family: "unix", Java version: 21.0.7, vendor: Eclipse Adoptium): mvn 3.9.10: 0:39 mvn4 master + R2.0.9: 1:36 mvn4 master + R2.0.10-SNAPSHOT: 1:42
The "R" is Resolver, and 2.0.10 contains this: https://github.com/apache/maven-resolver/commit/93bd1cb084e756beb3e544d368afaf006082f557 https://github.com/apache/maven-resolver/commit/daff12619a5be961a5dad8c191a47edc4ec353c4 But it is not the culprit it seems. Still, we now have a reproducer to work with, and MANY thanks for that! Thanks T On Fri, Jun 13, 2025 at 11:19 AM Sergey Chernov <serega.mo...@gmail.com> wrote: > > I made a simple multi-module project generator which has some size > parameters. > Please see project description here > https://github.com/maven-turbo-reactor/maven-multiproject-generator > > The good news is that it highlights the performance problem in comparison > between Maven3 and Maven4. > The generated project (which has 4k modules with default config, but zero > java source classes) takes 30sec on Maven3 and 1m40s on Maven4. > > I'd like to point that it also declares usage of maven-enforcer-plugin with > this config: > ``` > <plugin> > <groupId>org.apache.maven.plugins</groupId> > <artifactId>maven-enforcer-plugin</artifactId> > <version>3.3.0</version> > <executions> > <execution> > <id>enforce</id> > <configuration> > <rules> > <DependencyConvergence> > <uniqueVersions>false</uniqueVersions> > </DependencyConvergence> > </rules> > </configuration> > <goals> > <goal>enforce</goal> > </goals> > </execution> > </executions> > </plugin> > ``` > This plugin was my main suspect for the slowness, but it seems that any > plugin that iterates the dependencies (including any compilation plugin) > are affecting performance on Maven4. If enforcer plugin is removed, the > build is still slow on Maven4 (2.5x slower than Maven3). > > On Thu, Jun 12, 2025 at 1:33 PM Martijn Dashorst <martijn.dasho...@gmail.com> > wrote: > > > On Thu, Jun 12, 2025 at 1:48 AM Michael Bien <mbie...@gmail.com> wrote: > > > > > If there is a public project which hits this bottleneck I could take a > > > look and play > > > with some ideas to try to make this scale better. (I don't really want to > > > spam this thread > > > too much) > > > > > > > You could take a look at https://github.com/wicketstuff/core > > > > Lots and lots of projects.. > > > > Martijn > > --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@maven.apache.org For additional commands, e-mail: dev-h...@maven.apache.org
