I was looking for an easy-to-use CPU and memory profiling tool to fix some issues in Apache Lenya. I've worked with JProbe and JProfiler before, but they were a bit complex for my needs and too heavy on the RAM and CPU for my PowerBook. The YourKit Java profiler meets my requirements very well - I could get started without reading any docs and identified the first performance bottlenecks after a couple of minutes.
The integration with Tomcat works like a charm, I could hardly believe that everything ran out of the box without touching a single configuration file. The GUI is really well designed, I'm especially surprised about the responsiveness even on my quite old machine.
The only thing I'm missing until now is the call graph as for instance JProbe offers. But I guess that's just a matter of getting used to a new tool.
Keep up the great work, and thanks for offering a free license for open source developers!
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