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Systems & Performance
The most popular blog posts about systems & performance on Hacker News. 6,942 posts.
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LoJax: First UEFI rootkit found in the wild, courtesy of the Sednit group
ESET researchers have discovered the first in-the-wild UEFI rootkit. Dubbed LoJax, the research team has shown that the Sednit operators used different components of the LoJax malware to target a few government organizations in the Balkans as well as in Central and Eastern Europe.
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Zig's New Async I/O
Asynchrony is not concurrency.
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Chrome 55 uses 30% less memory than 54
Chrome 55 uses ~30% less memory for weather.com and reddit.com
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Continuous reinvention: A brief history of block storage at AWS
Marc Olson, a long-time Amazonian, discusses the evolution of EBS, highlighting hard-won lessons in queueing theory, the importance of comprehensive instrumentation, and the value of incrementalism versus radical changes. It's an insightful look at how one of AWS’s foundational services has evolved to meet the needs…
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An X11 apologist tries Wayland
I think it’s only fair to call me an X apologist. I get incredibly frustrated when people talk about dropping support for X11. I fight back against the notion that some day X11 will be dead and unmaintained, a curiosity of a time before. I’ve spoken to people in my circles at-length about the accessibility tools that…
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CockroachDB 2.0 Performance Makes Significant Strides
Learn which performance metrics matter, why to demand benchmark TPC-C results under serializable isolation, and how CockroachDB 2.0’s performance compares to 1.1.
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I almost failed to search a 37 GB text file in under 1 millisecond
... in which we check if your password has been compromised in many inconvenient ways, in a tale of destruction, obsession, and self-discovery.
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Advent of Compiler Optimisations 2025
Announcing AoCO 2025 - daily December posts about compiler optimisations
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Haiku R1/beta2 has been released
After almost 2 years since R1/beta1, Haiku R1/beta2 has been released. See “Release Notes” for the release notes, “Press contact”, for press inquiries … and “Get Haiku!” to skip all that and just download …
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Tiny Container Challenge: Building a 6kB Containerized HTTP Server
TL;DR I set out to build the smallest container image that I could that was still able to do something useful. By taking advantage of multistage builds, the scratch base image, and a tiny assembly-based HTTP server, I was able to get it down to 6.32kB!
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ClickHouse as an alternative to Elasticsearch for log storage and analysis
In 2018, I've written an article about Clickhouse, this piece of content is still pretty popular across the internet, and even was translated a few times. More than two years have passed since, and the pace of Clickhouse development is not slowing down: 800 merged PRs just during last month!
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Call me maybe: Aerospike
Previously, on Jepsen, we reviewed Elasticsearch’s progress in addressing data-loss bugs during network partitions. Today, we’ll see Aerospike 3.5.4, an “ACID database”, react violently to a basic partition.
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Building a distributed time-series database on PostgreSQL
Fully managed PostgreSQL from the creators of TimescaleDB. 99.9% uptime SLA, 10,000+ IOPS, columnar compression up to 95%, and built-in search. Try it free.
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The first plasma: the Wendelstein 7-X fusion device is now in operation
Start of operation and first plasma in the Wendelstein 7-X fusion research device at IPP Greifswald
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Why mmap is faster than system calls (2019)
When I ask my colleagues why mmap is faster than system calls, the answer is inevitably “system call overhead”: the cost of crossing the…
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Intel Processor Instability Causing Oodle Decompression Failures
RAD Game Tools' web page. RAD makes Bink Video, the Telemetry Performance Visualization System, and Oodle Data Compression - all popular video game middleware.
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How Discord handles over a million requests per minute with Elixir’s GenStage
This is the story of how we assessed and refactored two video players into one, cut the player code each product maintained by up to 94%, and swapped to the new player without disruption to any users.
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macOS Tahoe brings a new disk image format
ASIF disk images are new in Tahoe, and promise to be space efficient, as they’re sparse files, and almost as fast as the disk they’re stored on. Ideal for VMs and general use.
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MVCC – the part of PostgreSQL we hate the most (2023)
As much as Andy loves PostgreSQL, there is one part that is terrible and causes many headaches for people. Learn what it is and why it sucks.
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As much Stack Overflow as possible in 4096 bytes
Fitting as much Stack Overflow as possible into 4096 bytes
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How to sleep at night having a cloud service: common architecture do's
I like to sleep, but more importantly, I like to sleep while my cloud service is running.
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Systemd, ten years later: a historical and technical retrospective
10 years ago, systemd was announced and swiftly rose to become one of the most persistently controversial and polarizing pieces of software in recent history, and especially in the GNU/Linux world. The quality and nature of debate has not improved in the least from the major flame wars around 2012-2014, and systemd…
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Shared Cache Is Going Away
Browsers historically have had a single HTTP Cache. This meant that if www.a.example and www.b.example both used cdn.example/jquery-1.2.1.js then JQuery would only be downloaded once. Since it's the same resource regardless of which site initiates the download, a single shared cache is more efficient. [1]…
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A postmortem of three recent issues
A technical report on three bugs that intermittently degraded Claude's responses: what happened, why fixes took time, and what we're changing.
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