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It used to be that JavaOne had some of the very best tips and talks of each year. But it's probably been 15 years since JavaOne had huge 10_000+ attendence records (I believe the peak was 1999 with over 20_000 attendees). Post-pandemic JavaOne has had much more modest attendance, attaining similar sizes to many other Java focused conferences. But JavaOne still produces some good talks and great tips. This month all the talks and extracted tips in the newsletter are from JavaOne 2026.

Now on to all those talks, as well as the usual newsletter list of links, tips, tools and news, and as usual I've extracted all the tips into this month's tips page.

A note from this newsletter's sponsor

News

Java performance tuning related news

• A description of how architecture gradually changed in order to scale a real-time system
• Nulling out references won't help your garbage collector
• Reasonable (and short) AI generated vid on basic memory analysis for a containerized app

Tools

Java performance tuning related tools

• Java agent to detect blocking calls from non-blocking reactor threads
• Eliya OpenJDK 25+ distribution with reliable crash, memory, and runtime diagnostics
• canvas extension for GitHub Copilot to analyze GC logs and JFR recordings

Articles

• Java AOT in Production at Netflix (Martin Chalupa, Ian Brown/JavaONE)
• Post-Mortem JVM Crash Analysis with jcmd (Fairoz Matte/JavaONE)
• The Power of JDK Flight Recorder: Efficient Profiling and Troubleshooting for Java Applications (Mikael Vidstedt/JavaONE)

Jack Shirazi

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