Dmitry Konstantinov @java_dnk
Interested in Java performance tuning, distributed systems and high availability Cambridge, UK Joined November 2011-
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🚀 Call for Contributors If you're interested in contributing to the #JVM #Performance #Benchmarks project - an initiative that gained significant traction in the #Java community through our recent #JDK17 and #JDK11 analyses - check out the repo: 🔗 github.com/ionutbalosin/j…
A fantastic blog series on memory subsystem optimizations!!! johnnysswlab.com/memory-subsyst…
JEP 509 ("JFR CPU-Time Profiling (Experimental)") added. See openjdk.org/jeps/509
Profiling: you are doing it all WRONG! The SHOCKING truth about CPU vs. real time Now that I get your attention :) My perf latency profiling changes merged: web.git.kernel.org/pub/scm/linux/… First profiler ever that samples realtime (not CPU time) and suitable for latency optimization
Async-Profiler v4.0 Heatmaps and Native memory profiling and VMStructs-based stack walker github.com/async-profiler…
I am excited to finally announce the release of #netty 4.2.0.Final which is in the making for quite some time! This release comes with a lot of new exciting features, including the highly anticipated #io_uring support. See netty.io/news/2025/04/0…
Interesting issue in OpenJDK's UUID.compareTo(): It uses signed comparisons, which leads to unexpected sorting when the highest bit in either word is set. It can't be fixed since altering a sort order between versions is a big no-no. bugs.openjdk.org/browse/JDK-702…
🚨 There has been a breakthrough in the world of hash tables 🚨 A paper that disproves the longstanding conjecture that uniform hashing is optimal. "Optimal Bounds for Open Addressing Without Reordering" by Martín Farach-Colton, Andrew Krapivin, William Kuszmaul…
a university undergrad made hash tables faster and broke 40-year-old belief 🤯 for 40 years, it was believed that we cannot have better than O(n) operation for hash table worst case inserts and searches if it uses open addressing - for the hash index, look linearly until you…
Lilliput 2 (aka 4-byte-object-headers) is now in the Lilliput project repo (based on JDK25-dev). For testing, grab nightlies from here (thanks, @shipilev): builds.shipilev.net/openjdk-jdk-li…
New @CMUDB Course: Database Query Optimization! A survey of how to build a SQL optimizer from scratch covering foundational and state-of-the-art implementations. All lectures available on Youtube: 15799.courses.cs.cmu.edu/spring2025/
github.com/davidtos/JUring io_uring for Java. "Doing Random reads JUring achieves 33% better performance than Java NIO FileChannel operations for local files and 78% better performance for remote files."
Parts of Leyden and other CDS improvements are now in JDK mainline, in time for JDK 24 fork. The improvements are visible even on simple HelloWorld-style examples. There are even more things to squeeze!
Завтра, 12 ноября в 19:00 МСК, в преддверии нового сезона Podlodka Java Crew, посвященного асинхронной архитектуре, Никита Коваль раскроет внутренние механизмы каналов в Kotlin coroutines, которые делают их такими эффективными. youtube.com/live/qCCuSsR0i…
Let's say you commit a change that makes an application 0.05% slower. No big deal, right? Well, at the scale of Meta, it is a big deal--a small slowdown for a large application can waste thousands of servers. It's such a big deal that Meta needs a way to catch these performance…
Hello Apache Kafka 3.9.0! - last release using ZooKeeper - tiered storage is production-ready Plus many more KIPs, improvements, and bug-fixes. For details, check out the release blog post: kafka.apache.org/blog#apache_ka… Thanks to 133 contributors and our RM @cmccabe314!
Upgrade time! We just released Apache Kafka 3.8.1! Thanks to all 24 contributors and our RM @jlprat! For more details checkout out the release blog post: kafka.apache.org/blog#apache_ka…
📣 Calling all Cassandra users! Come explore Apache Cassandra® 5.0 and what to look forward to in Cassandra 5.1. 👁 Join @mck_sw and @sami_kaksonen on 30 October. RSVP ➡️ dtsx.io/3U2vMOF
Cassandra 5.0.2 released: github.com/apache/cassand… It contains an important fix: issues.apache.org/jira/browse/CA…
Leyden is going to be a breakthrough technology for startup and time-to-performance improvements. There are many other things that could be improved, squeezing even more perf. Just a taste:
Andrei Kogun @andrei_kogun
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visu @visu06537401
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Sam Lightfoot @samlighty
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Nelia Loginova @nelialoginova
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Stanislav @itstnslv
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Jaroslav Bahorik @BachorikJ
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Айгерим Бат... @nordman1717
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Mirabelle @MattKitto143959
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Тропинка в �... @deadmeaty
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Dima Volyxin @volyx
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Alexey @3tJWFzrPYSljKbZ
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Sofia Naimushina @Sofi_Nai
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Ben Dicken @BenjDicken
13K Followers 620 Following databases @planetscale Some stuff I've written: - https://t.co/YpfkF0JIKG - https://t.co/8OpZ7wtZWB - https://t.co/Xfx1AqbaeS
SapMachine @SweetSapMachine
546 Followers 166 Following An OpenJDK release maintained and supported by SAP SE.
dreamlike_ocean @dreamli60679407
124 Followers 334 Following 响应式编程爱好者，Java程序员 保守派基督徒 努力探索技术的边界 per aspera ad astra
Heinz Kabutz 🏝 �... @heinzkabutz
17K Followers 447 Following Author of mildly entertaining somewhat useful #Java Specialists’ Newsletter. Email is heinz at javaspecialists dot eu. https://t.co/Hy9Oi5T6VE
Eclipse Adoptium @adoptium
10K Followers 409 Following The Adoptium Working Group promotes and supports high-quality runtimes and associated technology for use across the @Java ecosystem. Part of @EclipseFdn
Bernard Traversat @BTraTra
1K Followers 18 Following VP Engineering, Java SE Platform, Oracle. "The statements and opinions expressed here are my own and do not necessarily represent those of Oracle Corp.”
Debasish (দেব�... @debasishg
12K Followers 631 Following Programmer. Author: Functional and Reactive Domain Modeling (Manning 2016), DSLs In Action (Manning 2010). Father. Husband. Seinfeld fanboy. FP aficionado.
Dmitry Vyukov @dvyukov
9K Followers 381 Following I tweet about fuzzing, bugs, sanitizers, security, hardening, kernels, syzkaller, Go, performance, concurrency, lock-free algorithms.
Sam Lightfoot @samlighty
478 Followers 368 Following Software in London. Trying to make things go faster.
Max Strakhov @mannoroch
2K Followers 135 Following AI/ML Engineering leader in FAANG, husband. Opinions are my own. https://t.co/eRfMoSbiyh https://t.co/HVRCERsCre
DataStax Devs @DataStaxDevs
8K Followers 85 Following We help devs build #GenAI apps with a stack of tools that makes it easy to go from idea to prototype to production 🚀
Denis Bakhvalov @dendibakh
5K Followers 448 Following Performance 🥷 @Intel. Book author📖. Blogger✍️. Speaker📢. Chess fan♟️. My newsletter: https://t.co/k0RKkc64zE. All opinions are my own. he/him
Nelia Loginova @nelialoginova
242 Followers 224 Following Engineering Leader | Cloud Platform Architect ☁️ | Scale systems, teams & myself | Thoughts and knowledge sharing 👉 https://t.co/L6r7X6ab8U
PostgreSQL @PostgreSQL
54K Followers 1 Following PostgreSQL - The world's most advanced Open Source Database
NetApp Instaclustr @Instaclustr
4K Followers 615 Following Intelligent, open source application data infrastructure for the enterprise #ApacheCassandra #OpenSearch #ApacheKafka #Redis #PostgreSQL #Cadence
Felix Geisendörfer @felixge
14K Followers 2K Following Software Engineer @datadoghq working on Go Profiling, Performance, OpenTelemetry and more. Before: @Apple, Co-founder @transloadit, @nodejs core dev
Quanta Magazine @QuantaMagazine
348K Followers 620 Following Illuminating math and science. Supported by @SimonsFdn. 2022 Pulitzer Prize in Explanatory Reporting.
Arpit Bhayani @arpit_bhayani
99K Followers 1K Following databases • staff engg @googlecloud memorystore (prev dataproc, ads) • creator @TheDiceDB • sold @profile_fyi, prev @unacademy, amazon
Tobias Grosser @Tobias_Grosser
2K Followers 4K Following Associate Professor. Compilers, Constraint Programming, Performance Programming, Hardware Design. https://t.co/Oq28Vv4UP8
Ankush Desai @ankushpd
2K Followers 778 Following Principal Scientist @AWS. Formal methods, systematic testing, fuzzing applied to distributed systems. Creator of P : https://t.co/Xnbk9a6xUw
Adam Warski @adamwarski
7K Followers 185 Following Sharing elegant solutions to everyday problems | R&D @ SoftwareMill | #Scala / functional programmer #FP | Blogger | #OSS developer
Cambridge Canoe Club @CamCanoeClub
3 Followers 17 Following Cambridge Canoe Club is a friendly, family-oriented community for paddlers of all levels and disciplines. Join us to learn, train, and connect with others!
Kelvin Nilsen @kdnilsen
54 Followers 17 Following Inventor of the original real-time Java. Founder of NewMonics. Three decades of leadership in high-level software approaches for time-critical systems.
Tej Kashi @TejasviKashi
588 Followers 4K Following Databases and distributed systems. Senior Software Architect @pgEdgeInc. MMath CS @UWaterloo, Ex-@IIScBangalore
Jonas Bonér @jboner
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RedHatJava @RedHatJava
3K Followers 158 Following The official Twitter account for Red Hat's Java team covering Java developer related community activities and technology. https://t.co/hCU44Pab3n
Aggelos Biboudis @biboudis
2K Followers 473 Following Advancing the @Java Language Specification 🚀 | Engineering for the Java Compiler @Oracle. This is my personal account; any opinions expressed are my own.
ICPE 2025 @ICPEconf
574 Followers 282 Following 16th ACM/SPEC International Conference on Performance Engineering, May 5-9, 2025, Toronto
Daniel Lemire @lemire
29K Followers 2K Following Software performance expert. Ranked in the top 2% of scientists globally (Stanford/Elsevier 2024) and among GitHub's top 1000 developers.
LondonJavaCommunity @ljcjug
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12K Followers 2K Following breaking databases @tursodatabase. W1 '21 @recursecenter excited about databases, storage engines and message queues
Piotr Sarna @sarna_dev
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Fluent Bit @fluentbit
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280 Followers 309 Following An IT exorcist, Wanderer, Developer Advocate @ DataStax.
JEP Updates @Jepupdates
531 Followers 27 Following Tracking updates to the Java Enhancement Proposals. See https://t.co/VV1VSeQQyd to learn more about JEPs. Not linked to any official Java/JDK/Oracle entity.
Dmitry /Undefined Beh... @Nekrolm
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639 Followers 179 Following bsky → @mck.semb.wever.org . .always happy. .sometimes attentive. .never on time. . lost somewhere in https://t.co/6lGcA5dNcQ
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