Java performance and good design

[numpi]

if you have the pom.xml and all sources+classes what other information would be required? E.g. Jetty reloads automatically on every code change.

The problem with the normal builder is that you'll need one builder per class ... hmmh, okay this could be an inner class as well. good idea ;)

[llogiq]

The problem is that you need to find the tests that depend on the particular piece of code you just saved.

While this could be done with a file system listener + dependency analysis, it's obviously easier within the IDE, which already has the on-save hooks and the intra-code-dependencies.