Java nerd heavily into production time profiling and diagnostics. Loves playing the piano. Pastafari.
Küssnacht
Joined September 2009
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Marcus Hirt retweeted
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.
buff.ly/yKE2nfq
Marcus Hirt retweeted
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! social.ora.cl/6011fdkbH
Marcus Hirt retweeted
Datadog is indeed fantastic! Prometheus and grafana are fine, but compared to datadog it feels like banging rocks together 😄
Marcus Hirt retweeted
Datadog has a reputation to provide the best, but not the cheapest products. However, one aspect that is easy to forgot is that good observability empowers engineers to significantly optimize cloud cost.
Learn how dogfooding our own products is saving us huge amounts of money.
Over a two-month period, our engineers recorded 15 performance optimizations that saved us $17.5 million in annual cloud spend. Learn how we dogfood different products and build our FinOps culture at Datadog: dtdg.co/cost-savings
Marcus Hirt retweeted
What's new in JDK Mission Control 9? Take a look at some of the key changes with @BillyKorando. social.ora.cl/6010jUvBE
Marcus Hirt retweeted
The new timeline view in Datadog Continuous Profiler gives you a detailed chronological visualization of multithreaded activity, helping you pinpoint causal factors behind non-parallelization and other runtime performance issues more easily. Read more: dtdg.co/timeline-view
Marcus Hirt retweeted
The @datadoghq Continuous Profiler always improves
datadoghq.com/blog/source-co…
docs.datadoghq.com/profiler/…
Note there’s also a plugin for @IntelliJIDEA & other JetBrains IDEs with a simpler integration, plugins.jetbrains.com/plugin…. If you are using Continuous Profiler, send feedback (TY).
Marcus Hirt retweeted
Go の Continuous Profiler、Datadog をよく聞きますね。
というか Datadog しか聞かない。
GoCon2024 でも Kanmu の方が話していて、それもprofile data を Datadog から取得してた。
これだ → gocon.jp/2024/sessions/9/
#layerxgo
Marcus Hirt retweeted
Datadog Continuous Profiler is just amazing 👌🚀
If you are using DDOG, but not profiling, just go enable it, now!
One of my favorite features of the Continuous Profiler we're building at @datadoghq is Custom Context.
It allows you to break down your resource consumption, like CPU usage, by any dimension.
You can add anything you want: Customer ID, Rule ID, Country, etc ...
Marcus Hirt retweeted
【新規レビューご紹介🎉】
株式会社ソーシャルPLUS(@SocialPLUSjp) terandardさんの #Datadog(@DatadogJ)レビューを公開しました！✨
findy-tools.io/products/data…
▼Datadog Continuous Profilerの導入成果📚
リクエスト全体の処理時間を 4 倍高速化することができました🚀
またリクエストがスパイクしてもアプリケーション全体が遅延することがなくなりました。 etc....
Marcus Hirt retweeted
JEP401 Early Access 1:
jdk.java.net/valhalla/
...language model complete. There is a performance EA due, and then mainline, it's getting real.
#OpenJDK #Java #ProjectValhalla
(openjdk.org/jeps/401)
Marcus Hirt retweeted
I would be open to talks with anyone interested in funding efforts to revitalize the @Jython project, updating it for modern Python and JVM features, making it a viable target for web, science, AI, LLM, and other applications. Python on the JVM has enormous potential.
Marcus Hirt retweeted
Project Leyden is starting to bear fruit for JRuby! With a patch from @ikai, I have a build of Leyden that HALVES JRuby’s base startup time and trims 25% off of a more complex “gem list” command. The days of slow JRuby startup time are coming to an end!
mail.openjdk.org/pipermail/l…
Marcus Hirt retweeted
👋🏻 I’m at @gopherconeu today and tomorrow. Come and say hello if you want to talk about go profiling, execution tracing, runtime metrics, frame pointers, performance, otel or anything else :).
#gopherconEU #golang
Marcus Hirt retweeted
Project Loom early-access builds just dropped with changes to avoid Java object monitors (“synchronized”) pinning native threads and breaking the promises of virtual threading. Very exciting, try it with your JRuby apps today (JRuby uses Loom for Fibers)!
jdk.java.net/loom/
Marcus Hirt retweeted
You can reduce CPU usage of your Go services by up to 14 percent with Datadog’s profile-guided optimization tool. Read how we used it in our own environment: dtdg.co/pgo-go
Marcus Hirt retweeted
OpenJDK JDK 22 General-Availability Release is here!
Builds for Linux / AArch64:
download.java.net/java/GA/jd…
Linux / x64:
download.java.net/java/GA/jd…
macOS / AArch64:
download.java.net/java/GA/jd…
macOS / x64:
download.java.net/java/GA/jd…
Windows / x64:
download.java.net/java/GA/jd…
#OpenJDK #JDK22
Marcus Hirt retweeted
Proud to have contributed to this along with @BachorikJ
We are grateful to the many experienced developers who reviewed proposed changes, the early adopters who tried out early access builds and reported issues, and the dedicated professionals who provided feedback on the OpenJDK mailing lists.
#OpenJDK#JDK22#JavaTogether
ALT Tree map chart with issues fixed in JDK 22 per organization. Legend: AliBaba Amazon ARM Azul BellSoft Canonical Datadog Fujitsu Google Huawei IBM Independent Intel ISCAS JetBrains Loongson Microsoft NTT Data Oracle Red Hat Rivos SAP Tencent