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The most popular blog posts about systems & performance on Hacker News. 6,943 posts.
macOS 15 Sequoia had a hard time with CoreStorage – and thus encrypted HFS+ volumes – since it deprecated both technologies and callously crippled some important tools for working with them, but nonetheless it mostly still worked. While I’d often – but not always – have to manually unlock one of my HFS+ volumes – but…
[This message comes directly from the desk of the Fedora Project Leader. — Ed.] In just one week, it will be fifteen years since we announced the release of Fedora Core 1. Now, we’re announcing the release of Fedora 29 — now not just “core”, but Workstation, Server, Atomic Host, a whole collection of desktop Spins […]
There are many legitimate arguments to be had about performance, but there are also plain old excuses. It's time to end the excuses.
In absolute terms they don’t have much overhead – think sub-microsecond for most uses. Which makes them perfectly acceptable when they’re used sporadically (e.g. only a few times per second).
The design of Datalevin's compact Clojure search engine, its T-Wand algorithm, and the full-text search benchmarks comparing it with Apache Lucene.
Don’t want a big old bloated multi-kilobyte executable with a data segment, but you do need to store some data?
F.lux is a wonderful tool for helping eye strain. People who stare at computer screens all day (like myself) can experience quite a bit of eye strain due to the harsh lights screens emit. One solution is to wear yellow tinted gamer goggles. I chose the cheaper route, installing software to adjust the color temperature…
The division instruction is one of the most expensive instruction in your CPU. Thus optimizing compilers often compile divisions by known constants down to a multiplication followed by a shift. However, in some lucky cases, the compiler does not even need a shift. I call the corresponding divisors ideal. For the math…
Early microprocessors were very slow when operating with floating-point numbers. But in 1980, Intel introduced the 8087 floating-point copro...
Decommissioned enterprise tesla GPUs are widely available and extremely cheap. In this post, I benchmark tesla GPUs to see if they are useful
This is the state of Linux security. With the most important updates around Linux and open source security. From conferences to self-protection.
Distributed computing and designing a system that supports modern commerce and other high-priority applications remains one of the most difficult tasks in computing. We provide expert tips.
Pumpkin is the name I have given to my port of PalmOS running on the x86 architecture. Please refer to this article for basic information on this project. Also look for other articles in the PalmOS…
Last week, I reached an exciting milestone in my career as a programmer. For the first time in my life, I ran code directly on hardware , with no Operating System sitting between the bare metal and my code.
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QUIC (Quick UDP Internet Connections) is a new encrypted-by-default Internet transport protocol, that provides a number of improvements designed to accelerate HTTP traffic as well as make it more secure, with the intended goal of eventually replacing TCP and TLS on the web.
The European Global Navigation Satellite System Galileo has recently been suffering from frequent "almost disruptions", most likely partially due to Corona, and possibly also due to Brexit, but in any case due to some historical stinginess. Before I explain what is going on, I should hasten to say that most days of…
I've been running QubesOS as my main desktop since 2015. It provides good security, by running applications in different Xen VMs. However, it is also …
Over the past several months, a handful of people had been complaining that Mercurial's test harness was executing much slower on Macs. But this slowdown seemingly wasn't occurring on Linux or Windows. And not every Mac user experienced the slowness!
Behold: the Guru of GNU ! (Photo by Habib Mhenni, Wikimedia Commons, CC BY-SA 3.0.) True enlightment only comes from a truly free computi...
When I was working on systems deployed in on-premises data centers, it sometimes happened I had to debug an unresponsive server. It usually involved asking someone to physically press a non-maskable interrupt (NMI) button on the frozen server or to send a signal to a command controller over a serial interface (yes…
"JVM Anatomy Quarks" is the on-going mini-post series, where every post is describing some elementary piece of knowledge about JVM. The name underlines the fact that the single post cannot be taken in isolation, and most pieces described here are going to readily interact with each other.
Render scaled its Knative infrastructure to handle 100k+ web apps, optimizing Kubernetes for free-tier services and reducing CPU usage to improve network performance.
I tried building FreeBSD AMIs for the 32-bit EC2 instance types the same way as I did the 64-bit instances — by defenestrating Windows AMIs — but there was a catch: They wouldn't boot. In fact, when I tried this six months ago, they not only didn't boot, but they didn't even produce any console output to help me…
Where does JIT-compiled code live? How does Ruby switch between bytecode and native execution? Why does TracePoint slow everything down? This post answers the JIT questions most Ruby developers have but rarely see explained.
