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Topics /
Systems & Performance
The most popular blog posts about systems & performance on Hacker News. 6,943 posts.
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Ditch your mutex, you deserve better
The Personal blog and musings of Chris Penner, a designer, developer and future opsimath.
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Laws of Performant Software
Learning how to write performant code is hard. Here are a few simple laws that I hope will convey the core of the matter. I’m calling them…
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Where are we going from here? Software engineering needs formal methods
The job of a software engineer is not to produce code, but to solve problems; we just happen to solve most of those problems by producing code. Ultimately, producing code is hard, and we need help. That's why GitHub's Copilot is exciting, but it's far from ideal, and it's the tip of the iceberg of what's been done and…
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Don't trust default timeouts
Modern applications don’t crash; they hang. One of the main reasons for it is the assumption that the network is reliable. It isn’t. When you make a network call without setting a timeout, you are telling your code that you are 100% confident that the call is going to succeed. Would you really take that bet? If you…
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A look under our trunk: what's in our compute
Compute is the brain of the Waymo Driver, translating raw sensor data into real-time driving commands. Operating demonstrably safe, physical AI on the road demands a fundamental shift towards a system engineered for deterministic, low-latency performance. Over the past decade, we have co-designed our hardware…
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Improving compression at scale with Zstandard
Two years ago, Facebook open-sourced Zstandard v1.0, a landmark data compression solution that offers best-in-kind performance. Since then, we’ve released a variety of enhancements and advanc…
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ZFS Gotchas
Things Nobody Told You About ZFS Yes, it's back. You may also notice it is now hosted on my Blogger page - just don't have time to deal w...
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League of Legends Chat Service Architecture
League of Legends players collectively send millions of messages every day. They're asking friends to duo-queue, suggesting a team comp on the champ select screen, and thanking opponents for a good game. On July 21st of this year (I p…
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Encrypted DNS and NTP = Deadlock
I recently found out the hard way that encrypted DNS can deadlock with NTP on embedded devices without a battery-backed clock.
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Roku LT Operating System open source distribution
Roku provides the simplest way to stream entertainment to your TV. On your terms. With thousands of available channels to choose from.
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Validating UTF-8 strings using as little as 0.7 cycles per byte
Most strings found on the Internet are encoded using a particular unicode format called UTF-8. However, not all strings of bytes are valid UTF-8. The rules as to what constitute a valid UTF-8 string are somewhat arcane. Yet it seems important to quickly validate these strings before you consume them. In a previous…
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FreeBSD Q2 2016 Status Report
This quarter brings several exciting improvements over previous models. We have enhancements from different teams, new features like robust mutexes and support for full disk encryption with GELI. You'll find expanded graphics support, both at the chipset and window manager levels, and ongoing development in many…
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FreeBSD Suspend/Resume
I have been using FreeBSD on the desktops/laptops since about 20 years now and I have described all that I configured in the FreeBSD Desktop series. About 1 year ago I shared a video on YouTube and…
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We could save petabytes of cache storage with Zstandard and Pingora
Could we get more cache space with the same hardware? We prototyped compression inside Cloudflare's cache to find out.
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Introducing FreeNAS Corral
In the TrueNAS blog, discover the latest in scalable data storage solutions. Stay updated on the latest innovations in TrueNAS technology.
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Ubuntu low-memory install for VMs
For those of you who play with virtual-machines like VMware, the Ubuntu server .iso contains an option for dramatically reducing the amount ...
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Imaging mounted disk volumes under duress
Backups are critical. If you are lucky and organised you have a set of useful backup primitives, such as Point in Time snapshots on your Infrastructure As A Service (IaaS), your disk array controller, or volume manager. However there always seems to be some critical machine in my life that does not fall into these…
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Bad Binder: Android In-the-Wild Exploit
Posted by Maddie Stone, Project ZeroIntroductionOn October 3, 2019, we disclosed issue 1942 (CVE-...
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The power of two random choices
In many large-scale web services, multiple layers of stateless and stateful services are seperated by load balancers. Load balancing can be done with dedicated hardware, with dedicated software load balancers, using DNS trickery or through a load-balancing mechanism in the client. In large systems, the resources and…
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Notes on the Amazon Aurora Paper
This is my notes on the paper: Amazon Aurora: Design Considerations for High Throughput Cloud-Native Relational Databases.
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WebOS OSE 2.1
We’re delighted to announce the release of webOS Open Source Edition (OSE) 2.1.0. The highlights of this release are as follows: Change of the default logging system to journald Japanese Virtual Keyboard support and iLib upgrade Bug fix and improvements For more details on this release, see the release notes. Change…
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On building 30k Debian packages
As part of my ongoing attempts to create some nice datasets for training large code models for C/C++ , I've recently been attempting to buil...