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haglin • today at 3:18 PM • 1 reply • view on HN

I work on OpenJDK, so I may be biased, but I’ve also found that JFR works really well with LLMs.

  $ java -XX:StartFlightRecording:maxsize=10M,filename=dump.jfr -jar app.jar

  $ jfr view all-views dump.jfr > report.txt

  $ jfr print dump.jfr > all.txt
Then ask Codex, or whatever AI tool you use, to analyze report.txt for issues and use all.txt to dig deeper, if needed.

Replies

re-thc • today at 4:26 PM

> but I’ve also found that JFR works really well with LLMs

There's also async profiler. LLMs just use whatever. Lots of choices.