Marcus Hirt

Java nerd heavily into production time profiling and diagnostics. Loves playing the piano. Pastafari.

[Marcus Hirt @hirt]

There really should be an official JVM Appreciation Day, where we give our JVMs some tea and a massage.

[Marcus Hirt @hirt]

Using @graalvm, JavaFX and a Clanker to Build a (Pretty) Cross Platform Desktop App:
https://t.co/Vv4ZYfuHTC

[Marcus Hirt @hirt]

How I got my inbox down from 30k+ emails to 5 flagged ones:
https://t.co/Oal0yaPJNI

YMMV.

[Marcus Hirt @hirt]

I am finally at zero unhandled emails in my (non-work) inboxes: https://t.co/TvoJdFRyoA

Claude + @graalvm FTW! ;)

[Marcus Hirt @hirt]

@headius You need many teams. :)

[Marcus Hirt @hirt]

The Virtual @OpenJDK Serviceability Meetup 2025 will be the 17th of December:
https://t.co/RP8EM1fLBG

[Charles Oliver Nutter @headius]

WOW 🤩 The OpenJDK Vector API improvements to the JRuby JSON lib now improve encoding perf by better than 2X on real-world benchmarks, all without writing a line of assembly code! The potential of JRuby to accelerate Ruby apps grows with every JVM release.
https://t.co/72gJW1VxSG

[Marcus Hirt @hirt]

@java JavaOne 2025 was awesome! :) Can't wait to attend the 2026 edition.

[Java @java]

JavaOne 2025 was such a hit that we just have to run it back. 😎

Save the date for our next #JavaOne event, coming to you March 17-19, 2026! https://t.co/sYA8dluOTK

[Java @java]

Full tournament results 👇

[Marcus Hirt @hirt]

Oooh! @OpenJDK @javamissionctrl won the tools category!
https://t.co/WvjAcTK5Xl

JMC 10 will have a lot of exciting features - including support for the new (proper) CPU profiler in https://t.co/Vm1UYbpILF.

On behalf of the project - thanks for all the votes! :)

[Java @java]

We’re ready to kick off the quarter-finals of the Best of Java Feature Face-Off! The matchups are getting intense as we inch closer to the finals. Place your votes now to see which features advance to the semi-finals! #30YearsOfJava

[Marcus Hirt @hirt]

Curious about open source? Join us in Switzerland on the 22nd of November for Hack-Commit-Push - a full day of hands-on OSS fun, no prior experience needed!

Great chance to contribute, learn & connect.

https://t.co/7Mv7udAYXS

@Hackergarten @OpenJDK @javamissionctrl

[Marcus Hirt @hirt]

The Eclipse Mission Control binary distribution of JMC 9.1.1 is available here:
https://t.co/T6wophxULa

[Marcus Hirt @hirt]

The @OpenJDK Mission Control 9.1.1 source release is now tagged. A small, but oh-so important, release for @javamissionctrl users on Windows:
https://t.co/GGAd2YfQcK
https://t.co/SpcuVOahHT

[Marcus Hirt @hirt]

@headius I've been thinking the same. Job security for observability vendors though. ;)

[Marcus Hirt @hirt]

Hej @kstefanj!

Regarding what we talked about at @JavaOne, this might help:
https://t.co/LtNE6gcyDt

[Marcus Hirt @hirt]

@AichaLaafia Nice! :)

[Marcus Hirt @hirt]

The @OpenJDK @javamissionctrl 9.1.0 source release is now available:
https://t.co/3z4eRFceJq

Here is what's new:
https://t.co/fPklsFpbXb

[Marcus Hirt @hirt]

@headius That context could, for example, be provided by a tracer (that's what we do at Datadog).

There is an ongoing discussion on how to best get "profiling labels" support for JFR. This would be an amazing tooling enabler, and support for it could then be added to JMC.

[Marcus Hirt @hirt]

@headius The best way to do this is normally to have context labelling the events/samples, so that you can easier make sense of it. That context, could for example be provided by a tracer. For now you could emit contextual events.