I've worked on a project that forked for each test. We were working around the abuse of static singletons. I had a very small look at a tool that could start JV

I've worked on a project that forked for each test. We were working around the abuse of static singletons. I had a very small look at a tool that could start JVMs in a pool that you use later on. We ended up splitting our tests using annotations to only create separate JVMs for tests that needed it. You could also look at class data sharing. Not a fun state of affairs, good luck!