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Happy 10th year, JCertif!

Notes

Welcome to Codetown!

Codetown is a social network. It's got blogs, forums, groups, personal pages and more! You might think of Codetown as a funky camper van with lots of compartments for your stuff and a great multimedia system, too! Best of all, Codetown has room for all of your friends.

When you create a profile for yourself you get a personal page automatically. That's where you can be creative and do your own thing. People who want to get to know you will click on your name or picture and…
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Created by Michael Levin Dec 18, 2008 at 6:56pm. Last updated by Michael Levin May 4, 2018.

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InfoQ Reading List

Presentation: Sleeping at Scale - Delivering 10k Timers per Second per Node with Rust, Tokio, Kafka, and Scylla

Lily Mara, Hunter Laine walk through the design of a system, its performance characteristics, and how they scaled it.

By Lily Mara, Hunter Laine

Article: Is Your Test Suite Brittle? Maybe It’s Too DRY

One important design principle in software development is DRY – Don’t Repeat Yourself. However, when DRY is applied to test code, it can cause the test suite to become brittle — difficult to understand, maintain, and change. In this article, I will present some indications that a test suite is brittle, guidelines to follow when reducing duplication in tests, and better ways to DRY up tests.

By Kimberly Hendrick

Allegro Reduces Kafka Producer Latency Outliers by 82% After Switching to XFS

Allegro experimented with different performance optimization options to improve Apache Kafka producer tail latency and eventually switched all its clusters to the XFS filesystem. The company used Kafka protocol sniffing, JVM profiling, and eBPF, which proved instrumental in identifying and eliminating performance bottlenecks.

By Rafal Gancarz

Presentation: Several Components are Rendering: Client Performance at Slack-Scale

Jenna Zeigen discusses front-end performance issues encountered by Slack as they continue to grow and evolve the desktop app.

By Jenna Zeigen

SSH Backdoor from Compromised XZ Utils Library

When Microsoft Engineer Andres Freund noticed SSH was taking longer than usual he discovered a backdoor in xz utils, one of the underlying libraries for systemd, that had taken years to be put in place. The backdoor had found its way into testing releases of Linux distributions like Debian Sid, Fedora 41 and Fedora Rawhide but was caught before propagating into more highly used stable releases.

By Chris Swan

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