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Here's to the systems programmers – Writing Hello World on a home brew CPU
Writing Hello World on a homebrew CPU
New
The latest blog posts to take off on Hacker News. 2,307 posts.
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A Brain Dump of What I Worked on for Uncharted 4
This post is part of My Career Series. 本文之中文翻譯在此 Now that Uncharted 4 is released, I am able to talk about what I worked on for the project. I mostly worked on AI for single-player buddies and multiplayer sidekicks, as well as some gameplay logic. I'm leaving out things that never went in to the
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Don’t invert that matrix (2010)
There is hardly ever a good reason to invert a matrix. What do you do if you need to solve Ax = b where A is an n x n matrix? Isn't the solution A−1 b? Yes, theoretically. But that doesn't mean you need to actually find A−1. Solving the equation Ax = b is
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Apple R&D Reveals a Pivot Is Coming
People are focusing on the wrong thing when analyzing Apple's path forward in the face of slowing iPhone sales . Instead of debating how much Apple will try to monetize the iPhone user base with services (not as much as consensus thinks), the company is instead planning its largest pivot y
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Cache-Control: immutable
About one year ago our friends at Facebook brought an interesting issue to the IETF HTTP Working Group - a lot (20%!) of their transaction...
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After reading “Rails is yesterday’s software”, I need to reply
After reading a blog post provocatively called “Today I accept that Rails is yesterday’s software” I felt the need to reply. I’m not sure why, I’m not going to convince anyone of anything, definitely not the author of that post. I want to reply because Rails is my current platform of choice, and let’s be honest…
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Zero size arrays in C
The current structure definition of the ion system heap involves a zero sized array:
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My url isn't your url
When I started the precursor to the curl project, httpget, back in 1996, I wrote my first URL parser. Back then, the universal address was still called URL: Uniform Resource Locators. That spec was published by the IETF in 1994. The term "URL" was then used as source for inspiration when naming the tool and … Continue…
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The Relativistic Rocket
Thanks to Alan R. Wilson for correcting a two-word typo involving GPS satellites. Thanks to Aron Yoffe for suggesting the newtonian comparison. Thanks to Tom Fuchs for suggesting the analogy to the stone thrown upwards. Fuel numbers added by Don Koks, 2004. Updated by Phil Gibbs, 1998. Thanks to Bill Woods for…
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uBeam's insider story by ex employee?
Today is the 6 month anniversary of my resignation from uBeam, a startup I'd spent the previous two and a half years working on. I had...
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Aggregation Theory
The disruption caused by the Internet in industry after industry has a common theoretical basis described by Aggregation Theory.
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Teaching C
I was hoping you would mention the dynamic checkers, ASAN etc. My fear is people will start using these but not understand how to really use them properly. Since they’re dynamic checkers you really need a good testing harness and test cases to go with it. The bugs ASAN/TSAN etc catch are usually strange boundary…
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I'm a good engineer but I suck at building stuff
I'm the head of engineering at Tegus. I write about politics, psychology, and software.
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Why do old statues have such small penises?
Reader question: “Why do all old statues have such small penises?” The reader who sent me this felt that it was a question that was maybe too silly for my blog, but – firstly – there ar…
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Cal – Display a Calendar in Your Terminal
Adrian Sieber's personal website and blog
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Finding Similar Music Using Matrix Factorization
In a previous post I wrote about how to build a ‘People Who Like This Also Like …’ feature for displaying lists of similar musicians. My goal was to show how simple Information Retrieval techniques can do a good job calculating lists of related artists. For instance, using BM25 distance on The Beatles shows the most…
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Self-host analytics for better privacy and accuracy
Something that always annoyed me of the current state of technology is how easy and pervasive we let tracking become. Tens of connections to 3rd parties carrying Referer and Cookies just to load an article. (We give up our users to social media websites just to show a like button that looks worse anyway in a iframe…
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PostgreSQL Scalability: Towards Millions TPS
PostgreSQL scalability on multicore and multisocket machines became a subject of optimization long time ago once such machines became widely used. This blog post shows brief history of vertical scalability improvements between versions 8.0 and 8.4. PostgreSQL 9.2 had very noticeable scalability improvement. Thanks to…
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Why OpenBSD Is Important to Me
The freedom to speak in private is essential to democracy. The less private your conversations, the more careful you are about what you say. And being careful leads to less candor, less criticism, and less innovation. Thought and private speech are the breeding ground for new, sometimes controversial ideas. They are…
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Creativity is a great motivator
After a few years teaching a beginners course, I realized that using creativity is a great motivator to learn programming. Even in a technical field like software engineering, even with logic-driven students, the desire to create and express oneself is stimulating and inspiring.
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Number plate recognition with Tensorflow
Over the past few weeks I’ve been dabbling with deep learning, in particular convolutional neural networks . One standout paper from recent times is Google’s Multi-digit Number Recognition from Street View . This paper describes a system for extracting house numbers from street view imagery using a single end-to-end…
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Living Only on Bitcoins
I’ve been interested in BitCoin since the very beginning but, until now, I considered BTC some very nice cryptographic experiment with high potential but almos…
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Code Page 437 Refuses to Die
I am updating volume 2 of Core Java and got stuck on the section on text files in the internationalization chapter. How hard can this be in 2016? Surely everyone uses UTF-8 these days. Or do they? Make a file Test.java