Or: How I use GitHub Copilot to go from feature to idea
A few weeks back, I introduced you to jstall (Quickly Inspect your Java Application with JStall), a tool that analyses what your JVM is currently doing. This week is the first time I’m bringing you in on the development and letting you peek behind the curtains to see how I go from idea to implemented feature. The feature I’ll implement the jvm-support analysis that checks that the JVM running your application is not outdated.
This is the first time I recorded my development process, so I hope you still liked it.
See you on another day for something command-line parser- or redaction-related.
This blog post is part of my work in the SapMachine team at SAP, making profiling easier for everyone.
Johannes Bechberger is a JVM developer working on profilers and their underlying technology in the SapMachine team at SAP. This includes improvements to async-profiler and its ecosystem, a website to view the different JFR event types, and improvements to the FirefoxProfiler, making it usable in the Java world. His work today comprises many open-source contributions and his blog, where he regularly writes on in-depth profiling and debugging topics. He also works on hello-ebpf, the first eBPF library for Java. His most recent contribution is the new CPU Time Profiler in JDK 25.
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