Karm Michal Babacek @_karm
Team OpenJDK, new circus performer, welding, concrete casting, tarantulas keeping. Past: httpd, load balancing, Tomcat, clustering, DNS, augmented reality, LARP github.com/Karm 🇪🇺 Joined September 2009-
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Karm Michal Babacek retweeted
Pokémon Emerald Source Code Commentary: 🔗0xabad1dea.github.io/emeraldscc/
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Karm Michal Babacek retweeted
What Makes System Calls Expensive: A Linux Internals Deep Dive. blog.codingconfessions.com/p/what-makes-s… Another great post by @abhi9u. I learned a lot, including vDSO.
Karm Michal Babacek retweeted
Not sure why but we have lots of new followers! FFmpeg makes extensive use of hand-written assembly code for huge (10-50x) speed increases so we are providing assembly lessons to teach a new generation of assembly language programmers. Learn more here: github.com/FFmpeg/asm-les…
Karm Michal Babacek retweeted
JDK 25 is now in rampdown for release in Sep 2025. It is very likely to become another LTS release. I cannot stress this enough: if you are planning to use JDK 25 this year, you have to start testing it now, so that we have enough time to work out the issues, if any.
Karm Michal Babacek retweeted
JFR is getting a new method sampler that walks stacks at safepoints in JDK 25. Learn all about the new sampler in this week's blog post: mostlynerdless.de/blog/2025/05/2…
Long hard look at the whole toolchain of ours...
Long hard look at the whole toolchain of ours...
Karm Michal Babacek retweeted
[1/*] If we take the chance that a tool (compiler, linker, batch, whatever) remains working for a particular codebase after one year as a given probability p, then the chance that build remains working after x years is p^xn, where n is the number of tools used in the build.
Karm Michal Babacek retweeted
There's a small house (⌂) in the middle of Code Page 437. "Small house" is the official IBM name given to the glyph at position 0x7F, where a control character for "Delete" should exist. How did it get there? Why did IBM represent it as a "house"? 🔗blog.glyphdrawing.club/why-is-there-a…
Karm Michal Babacek retweeted
I recently had the honor of interviewing Zen’s chief architect Mike Clark! I tried to fit in as many microarchitecture questions as I could, including x64 vs ARM ISA power efficiency, 4k vs larger page sizes, 64-byte cache lines, scatter/gather and more: computerenhance.com/p/an-interview…
Karm Michal Babacek retweeted
New blogpost: Learn how to build JDK 21 and JDK 25 with the HotSpot Disassembler (HSDIS) plugin enabled for Linux. `hsdis` is a tool to inspect the JVM’s JIT-compiled assembly code, and this post explains how to configure it: 🔗jjfumero.github.io/posts/2025/02/… #java #disassembler
Karm Michal Babacek retweeted
🚀 Our first YouTube video is live! Watch how #Mandrel, #TornadoVM, and #oneAPI Construction Kit accelerate #Java performance on ARM #CPUs & NVIDIA #GPUs. 🔥 🎬 youtu.be/lb6nlziiyEs?fe… @csmcr @RedHatJava @codeplaysoft #opensource #acceleration @EU_HaDEA @_UKRO_
Karm Michal Babacek retweeted
We are adding a new chapter on LLVM IR to our "Compilers & Interpreters" module. It will go live early next week.
Karm Michal Babacek retweeted
We are looking for interns interested in compilers, language runtimes, and developer tools! Feel free to reach out if you have any questions. 🙂
We are looking for interns interested in compilers, language runtimes, and developer tools! Feel free to reach out if you have any questions. 🙂
Karm Michal Babacek retweeted
I’m inspired
Karm Michal Babacek retweeted
Both clang and GCC fail to vectorize code that accumulates a state into a bool value. If the intermediate bool state is accumulated into an int, auto-vectorization works. godbolt.org/z/q1q16ooWG
Karm Michal Babacek retweeted
🥳 JEP proposed to target JDK 24: 450: Compact Object Headers (Experimental) 🎉 mail.openjdk.org/pipermail/jdk-…
I can close the Internet now.
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