I've been looking into Spock and I've had experience with FitNesse. I'm wondering how would people choose one over the other - if they appear to be addressing the same or similar problem space.
Also for the folks who have been using Spock or other groovy code for tests, do you see any noticeable performance degradation? Tests are supposed to give immediate feedback - as we know that if the tests take longer to run, the developer tends to run them less frequently - so I'm wondering if the reduction in speed of test execution has had any impact in the real world.
Thanks