Poll: Developers, do you use a profiling tool?

Justin James asks whether you use profiling tools in your development work and, if so, how do you use them? Take this TechRepublic poll.

Telerik recently released a beta of its new JustTrace profiling product, which joins the ranks of JetBrains dotTrace and the profiler built into Visual Studio. I've used a profiler in the past to track down problematic pieces of code, but it is not something that I incorporate in my regular workflow.

I find that knowing how to use a profiler is a useful skill, but I do not know many developers who use profiling tools. If you take advantage of profiling tools, how do you go about using them?