Using the server from multiple test files does multiple unneccessary build runs

[Beiri22]

We are using multiple .test.ts - files to structure our tests. All of them are using the server and thus the configuration await setup({server: true, dev: false});

Watching the tests progress, I noticed that the server is built for every test file again. I my opinion this is an unneccessary waste of time. The server could be build a single time at the beginning of the test run.

[paambaati]

+1. We have a pretty large test-suite, and the build-once-per-test-file is killing us. We've tried multiple hacks (like creating a singleton promise out of setup) but they don't seem to work – setup needs to be called inside a Vitest context, and I don't know (yet) how to lift the setup call outside of it to cache it.