I stumbled upon the presentation of parallel builds in Eclipse at the EclipseCon 2018 from Mickael Istria:
https://de.slideshare.net/mickaelistria/parallel-builds-in-eclipse-ide-workspace-eclispecon-europe-2018
Until now I had no success in seeing parallel builds. We invoke the Java and the Maven builder and the test plugin gives me a Gantt diagram, but there are no parallel builds at all, just the regular sequential build process. I think the test plugin works if automatic builds are disabled only. its the only situation where I’m getting the diagram file.
I don't remember much about the test plugin to be honest, but indeed, I believe it only monitors full build, not automatic/increment.
Is the “default building order” necessary for the test plugin or am I wrong?
Can I get any meaningful logs from Eclipse itself and/or the test plugin? The file ".metadata/.log" is a way too shy I think.
I do not find much information about parallel builds at all, so I may overlook something.
The video of the presentation is the 2nd best documentation; and the source code is the very best documentation ;)
HTH