On Thu, Aug 27, 2020 at 1:30 AM Jaroslav Tulach <jaroslav.tul...@gmail.com> wrote: > Hypothesis: Probably different Ant and Maven integration into the NetBeans > IDE. > While Ant is executed in the same JVM as the IDE in an isolated classloader, > Maven is probably always started as a separate process.
Yes this likely accounts for a lot of the difference. For a regular edit-test-edit-test cycle you can use the misleadingly named “compile on save” feature to save time, but in the case of Maven projects it still does launch `mvn`, just with a minimal set of mojos. At one point Maven CoS used the IDE’s built-in test runner (incidentally implemented with in-JVM Ant), just passing along the classpath introspected from the POM, but we switched to launching actual Maven to get better compatibility with projects with subtler configuration (IIRC). At any rate, I like the idea of reusing a JVM in the style of `mvnsh` for repeated Maven invocations in routine developer workflows. It would be important to keep not only Maven core loaded, but mojo class loaders, since these are often large and expensive to initialize. You would have to tune it in various ways, for example · Shut down automatically after some idle period. · Avoid sharing an instance between projects. · Run a regular forked `mvn` for executions that smell production-y, such as anything using the `clean` or `install` phases. It is possible that given a warm JVM, we could dispense with any special CoS tricks and still get reasonable performance from the stock lifecycle up to the `test` phase. It depends in part on the project config: if your POM is requesting a ton of plugins run in earlier phases (CheckStyle, etc.), there will still be lots of overhead unless the IDE passes a bunch of `-DskipSomething` properties. --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@netbeans.apache.org For additional commands, e-mail: dev-h...@netbeans.apache.org For further information about the NetBeans mailing lists, visit: https://cwiki.apache.org/confluence/display/NETBEANS/Mailing+lists
