The first rush of .NET involved learning and building. In creating the .NET CLR [Common Language Runtime], Microsoft embraced a whole new level of abstraction - raising some concerns about performance. Now that the widespread rollout of .NET apps is underway, commercial tools are becoming available to ensure application performance levels. In Tuning .NET, Part One: Performance monitors appear, writer Colleen Frye considered some of the tools available. Here she expands that consideration. Tools that information on end-user response times, browser-level performance, network latency, server performance, Frye writes, have the potential to minimize the application support time required of developers, freeing them up to create more new applications.