Build your own profiling tool

Article by Andrew Wilcox, 10 pages, 30 minutes.
In this article the author shows how to create a simple profiler using Java Agents (a new feature in Java 5) and ASM (a byte code injection framework). The article sticks to only explaining the bare essentials and only mentions what other things are possible. As such it read more like a plug for Java Interactive Profiler than anything else. Still, I learned how to load Java Agents and that technology looks promising.
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