1.0.0-m1 slower than 0.8.2

[ppalaga]

When building Camel Quarkus with these changes apache/camel-quarkus#4355 in place using

mvnd clean install -Dquickly

1.0.0-m1 is slower than 0.8.2 by more than 10 seconds.

At the first sight the initial scanning of Maven modules takes much longer. It is ~9 seconds with 0.8.2, but ~19 sec with 1.0.0-m1.

Is this expected, @gnodet ?

[ppalaga]

Scanning for projects... takes ~10 seconds even when I am in a directory where there is just a single project.

[gnodet]

Scanning for projects... takes ~10 seconds even when I am in a directory where there is just a single project.

That's https://issues.apache.org/jira/browse/MNG-7646

[gnodet]

When building Camel Quarkus with these changes apache/camel-quarkus#4355 in place using

mvnd clean install -Dquickly

1.0.0-m1 is slower than 0.8.2 by more than 10 seconds.

At the first sight the initial scanning of Maven modules takes much longer. It is ~9 seconds with 0.8.2, but ~19 sec with 1.0.0-m1.

Is this expected, @gnodet ?

I'm aware of the problem, and no this is not really acceptable imho. I raised MNG-7647.

[mthmulders]

even when I am in a directory where there is just a single project.

Do you mean a directory that is part of a multi-module project, but has no child modules? Or do you mean a directory that has a single project, i.e. not part of multi-module project?

[ppalaga]

even when I am in a directory where there is just a single project.

Do you mean a directory that is part of a multi-module project, but has no child modules?

Yes, exactly this.

[mthmulders]

Yes, exactly this.

Thanks for clarifying.

I'm wondering if there's a measurable difference if you disable build/consumer POM decoupling. From MNG-6656, it should be possible to disable that with -Dmaven.experimental.buildconsumer=true. Is that something you could try, please?

[gnodet]

I haven't pinpoint the exact problem, however mvnd 1.0.0-m1 is noticeably slower than 0.8.2. More significant, running mvn foo (so that all projects are parsed but no plugin is executed) was expectedly faster with mvnd 0.8.2 than maven 3.8.6, but mvnd 1.0.0-m1 is slower than maven 4.0.0-alpha-3.
This clearly points toward a problem in mvnd 1.0.0-m1 imho...