Jack of all trades, master of none... @RedHat, performance focused, contributor to @Quarkusio @Jboss opinions are my own
UK
Joined February 2009
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John O'Hara retweeted
Attend the 2025 JChampions Conference online on January 23, 24, 27, 28. All sessions are led by a Java Champion.
Speakers & Session at jchampionsconf.com/.
Free tickets: tinyurl.com/2pyth6cv.
Watch previous sessions: tinyurl.com/57d9yn8v
John O'Hara retweeted
Attend the 2025 JChampions Conference online on January 23, 24, 27, 28. All sessions are led by a Java Champion.
Speakers & Session at jchampionsconf.com/.
Free tickets: tinyurl.com/2pyth6cv.
Watch previous sessions: tinyurl.com/57d9yn8v
John O'Hara retweeted
Attend the 2025 JChampions Conference online on January 23, 24, 27, 28. All sessions are led by a Java Champion.
Speakers & Session at jchampionsconf.com/.
Free tickets: tinyurl.com/2pyth6cv.
Watch previous sessions: tinyurl.com/57d9yn8v
John O'Hara retweeted
And ... it's landed! 🥳🥳
Thank you for your patience!
And huge shout-out to @tstuefe and @stekarmatrik and all other contributors (too many to list them, check the PR) for all their help and support! 🙏🙌
John O'Hara retweeted
AI Flame Graphs: Showing what's actually running on the HW and how we got there. Uses Intel EU stall profiling and eBPF. brendangregg.com/blog/2024-1…
John O'Hara retweeted
I'm so annoyed that I forgot to mention Dr. Vroom (true name!) in my #QConLondon talk yesterday.
But my (Dr. Vroom-less) slides are here, and there's other good stuff in them, like angry crabs and folding see-saws and how Quarkus Panache works: hollycummins.com/quarkus-eff…
John O'Hara retweeted
It's past midnight where it was born, so 284 releases later, Happy Birthday @QuarkusIO!!!
John O'Hara retweeted
I am *extremely* happy to report that Elastic has filed a ticket to donate the universal profiling agent (the multi-runtime frictionless eBPF profiler formerly known as prodfiler) as project to OpenTelemetry. This is of course still pending TC review and many other step, but...
John O'Hara retweeted
Our messaging team is looking for an Engineer to work with #Kubernetes and #ApacheArtemis using #Java and #Golang.
They are looking for candidates in #Czechia, #Spain, #Italy, but if you live elsewhere (i.e.: #Brazil) and have these skills, do reach out.
global-redhat.icims.com/jobs…
Interested in #Java problems like the #1brc? Come join the #RedHat Application Services Performance team. We are hiring! global-redhat.icims.com/jobs…
John O'Hara retweeted
We found native-image started producing larger binaries and wanted to explore why. Foivos walks through what we learned in this detailed blog - great for those wanting to understand the delicate balance walked between memory, image size, and performance.
buff.ly/46X87DI
Am still raw from this. Less than 24 hrs since a keystore was deleted in prod, recovered, but the keystore password was missing from the vault 🤣
John O'Hara retweeted
Mario and @forked_franz deliver a masterclass on all the profiling techniques that will be made impossible by removing VMStructs.
The #Devoxx team is amazing as usual and the video of the deep dive on profiling that @forked_franz and me gave yesterday is already available youtu.be/Cw4nN5L-2vU?si=Hk6o…
To give a try to the examples we used during the talk simply clone our project github.com/franz1981/quarkus…
Awesome @devoxx talk by @mariofusco and @forked_franz with a deep dive into profiling tools and techniques, and how they are used for @QuarkusIO and @RedHat JVM projects to diagnose and solve complex performance issues!
The #Devoxx team is amazing as usual and the video of the deep dive on profiling that @forked_franz and me gave yesterday is already available youtu.be/Cw4nN5L-2vU?si=Hk6o…
To give a try to the examples we used during the talk simply clone our project github.com/franz1981/quarkus…
John O'Hara retweeted
Are you ready to crack the scalability wall? Watch @forked_franz & @SanneGrinovero's #DevoxxUK2023 conference talk on how to improve performance with simple, small changes. 🚀👩💻 #Java
View talk @ devoxx.co.uk/talk?id=2741
John O'Hara retweeted
@vertx_project t the nerverending efforts to optimize the stack has paid off on @TFBenchmarks !
See techempower.com/benchmarks/#…
John O'Hara retweeted
This day 4 years ago #Quarkus v0.11 was released to the world. Happy Anniversary @QuarkusIO!!!
John O'Hara retweeted
#pgagroal is part of Google Summer of Code 2023 ! Take a look at our ideas @ wiki.postgresql.org/wiki/GSo…. #PostgreSQL #pgagroal
John O'Hara retweeted
Just added a short guide on how to troubleshoot redhatperf.github.io/post/ty… at
github.com/RedHatPerf/type-p…
it contains a JMH bench and a reproducer too, to have fun :)
