So we had some forms in our .NET application that were slow. I took the opportunity to try out some .NET Profiling tools. CLRProfiler Red-Gates ANTS Profiler JetBrains dotTrace Speed Trace Pro CLRProfiler Not too useful for my application. I couldn't figure out how to easily track down slow code with it. ANTS Profiler The source code view of this profiler is awesome. It shows you line-by-line execution time for statements, highlighting the slowest lines with a bargraph in the margin. Very useful....