Spring Insight Developer answers the question "What just happened?" It is a VMware® Web application that gives you real-time visibility into application behavior and performance. In development and testing stages, developers can use Spring Insight Developer to verify immediately whether their newly-written code is behaving as designed. QA engineers can pinpoint specific causes for "what just happened" and relay detailed information to developers. Stress testing an application typically tells you which URL areas are slow. By combining Spring Insight Developer with your existing tools (such as JMeter), you can see not only which URLs are slow, but why, thus accelerating your time to production.