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Long distance sound localization with the Raspberry Pi
TDOA Sound Localization is determining the source of a sound when all you know is the differences in the time of arrival of the sound event…
New
The latest blog posts to take off on Hacker News. 569 posts.
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So good, it works on barbed wire (2001)
Next time you look at a transmission line, I hope you'll focus on the big four properties: characteristic impedance, high-frequency loss, delay, and cros...
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Making EC2 boot time faster
It's possible to cut EC2 boot time from 40 seconds to 5 seconds by combining several optimizations like root volume streaming, instance warm pools, and instance resizing.
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S3 is showing its age
I'm squarely in the trough of disillusionment with S3.
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Rare things become common at scale (2014)
Software doesn't scale through architecture and automation alone. New, more difficult problems appear that didn't exist before, causing new downstream consequences.
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How terminal works. Part 1: Xterm, user input (2021)
Hi there. I am going to post here thing about my work or my technical hobbies. This means c++, java, haskell, python, linux etc.
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Using Postgres for Everything
What Postgres for Everything means to a dev deploying all sorts of databases. Spoiler: it’s about collapsing your stack and keeping it simple.
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Beating Jeff's 3.14 Ghz Raspberry Pi 5
Jeff came up against a 1V limit in his video " Overclocking Raspberry Pi 5 to 3.14 GHz on Pi Day " after firmware was released to remove the 3Ghz limit.
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Transforming a QLC SSD into an SLC SSD
In today's article, we're embarking on something unprecedented! We'll guide you step by step through the process of transforming an SSD equipped with QLC NANDs into an SLC SSD, significantly enhancing its durability and overall performance!
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Visualizing algorithms for rate limiting
Smudge.ai is a Chrome extension that gives you ChatGPT-powered shortcuts in your right-click menu.
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State of the Terminal
This is a companion article to my talk at Neovimconf 2023. I have been using Vim/Neovim as my full time text editor for close to 10 years. I’ve spent a lot of time in the terminal and have become very aware of the many flaws and idiosyncrasies of this bizarre platform. But I also think it gets a lot of things right!…
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Making a Postgres query 1k times faster
Learn how we discovered what was slowing down large database queries, and what we did to make Postgres queries 1000x faster.
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Jepsen: Datomic Pro 1.0.7075
Datomic is a general-purpose database intended for systems of record. In many ways, Datomic is unusual. At any instant in time, the state of the database is represented by a set of [entity, attribute, value] ( EAV ) triples, known as datoms . Each datom declares that some entity (like a person) has a particular…
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Optimizing ClickHouse: Tactics that worked for us
At LaunchDarkly, we ingest nearly 100 terabytes of observability data from our customers every month.
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Fast linked lists
Using linked lists to optimize performance in a JSON schema validator.
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Upstreaming Linux kernel support for the Snapdragon X Elite
Discover the power of Snapdragon X Elite with upstreamed Linux kernel support. Explore areas of focus and unlock new potential with Snapdragon Linux today.
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Intel announces the Aurora supercomputer has broken the exascale barrier
At ISC 2024, Intel announces Aurora is the fastest AI supercomputer, has broken the exascale barrier, and details the importance of an open ecosystem in HPC and AI.
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GPUs Go Brrr
how make gpu fast?
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Garbage Collectors Are Scary
Garbage collectors are expected to be invisible: if programmers (or even users) notice them, something is wrong. Usually, such problems are are performance problems, but there could be correctness issues as well. This makes implementing them a bit scary.
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Virtualizing the 6502 on a 6502 with 6o6
Okay, promises, promises. Here's the first of my bucket list projects I'm completing which I've intermittently worked on for literally two d...
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Flatcar: OS Innovation with Systemd-Sysext
The current state of systemd-sysext in Flatcar and the next steps
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OpenBSD Desktop
I am a minimalist, and I tend to always keep it as small as I can, so I try to use all I have in base (if it fits), plus of course some other tools needed.
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Making Sense of Acquire-Release Semantics
Multiprocessor Synchronization was one of my favorite classes during my undergrad — it had a clear progression from theory to practice, starting at the theory of consensus numbers and moving onto atomic operations and then synchronization primitives and lock-free data structures, all from first principles. With…
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Unix and Multics (2019)
Story from the development of the Multics operating system. Unix, our famous child.
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So We've Got a Memory Leak
A story of finding, understanding, and fixing a memory leak in our Rails app. With graphs and code!
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It's always TCP_NODELAY
The first thing I check when debugging latency issues in distributed systems is whether TCP_NODELAY is enabled. And it’s not just me. Every distributed system builder I know has lost hours to latency issues quickly fixed by enabling this simple socket option, suggesting that the default behavior is wrong, and perhaps…