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Implementing FizzBuzz on an FPGA
I recently started FPGA programming and figured it would be fun to use an FPGA to implement the FizzBuzz algorithm. An FPGA ( Field-Progra...
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The latest blog posts to take off on Hacker News. 2,330 posts.
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Qualcomm, National Security, and Patents
The Trump administration blocked Broadcom’s acquisition of Qualcomm, and I think it was the right move. Understanding why means understanding Qualcomm and Broadcom’s plan for the compan…
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Lossy GIF compressor
This is an encoder (based on gifsicle ) which implements lossy LZW compression. It can reduce animgif file sizes by 30%—50% at a cost of some dithering/noise.
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Attacking Merkle Trees with a second preimage attack
Hacking, hardware, software, and general curiosities of computing machinery! Docendo discumus.
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PyTorch – Internal Architecture Tour
Update 28 Feb 2019: I added a new blog post with a slide deck containing the presentation I did for PyData Montreal. Introduction Short intro to Python extension objects in C/C++ Zero-copy PyTorch Tensor to Numpy and vice-versa Tensor Storage Shared Memory DLPack: a hope for the Deep Learning frameworks Babel…
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Modeling Redux with TLA+
Update 01/07/19 Greetings from 2019! The good news is that Chicago isn’t yet a radioactive crater. The bad news is almost everything I said about refinement in this article is wrong. I’m working on writing a more in-depth, rigorous treatment of refinement as its own article. But this one is currently explaining…
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Concurrency I can finally understand and write correctly
I wrote my Advent of Code in D. The programming language. It was the first time I used D in earnest every day for something substantial. It was fun and I learned things along the way, such as easy metaprogramming, concurrency I could write correctly, and functional programming that doesn’t feel like I have one arm…
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Compressing and enhancing hand-written notes (2016)
I wrote a program to clean up scans of handwritten notes while simultaneously reducing file size.
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Slack's bait and switch
Slack has finally decided to close down their IRC and XMPP gateways. True to form, you can only read their announcement if you already have a Slack account and…
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TLS 1.3 and Proxies
I'll generally ignore the internet froth in a given week as much as possible, but when Her Majesty's Government starts repeating misunderstandings about TLS 1.3 it is necessary to write something, if only to have a pointer ready for when people start citing it as evidence.
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The KK Computer: A Radical 6502 Redesign
The main feature is fast access to a flat, 24-bit address space. Although there are many ways to retrofit a 'C02 with expanded memory, AFAIK none can touch this implementation for speed. Given any random address in the 16 megabyte space, KK can fetch that byte in 6-8 cyles. It's fast because:
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How Ethereum can be stolen through DNS rebinding
The Post has been moved here
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Frequent versus infrequent developers, in languages and so on
You're probably reading this page because you've attempted to access some part of my blog (Wandering Thoughts) or CSpace , the wiki thing it's part of. Unfortunately you're using a browser version that my anti-crawler precautions consider suspicious, most often because it's too old (most often this applies to versions…
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The Rubik's Contraption
A collaboration with Jared . Before any build log, here's a video: That was a Rubik's cube being solved in 0.38 seconds. The t...
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Stateful Experiments on AWS Lambda
In January 2017, we presented results to the European Commission on a FP7project called SyncFree, where we were tasked with a large-scale evaluationof the Lasp programming system. In this evaluatio...
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Master password in Firefox or Thunderbird? Do not bother
There is a weakness common to any software letting you protect a piece of data with a password: how does that password translate into an encryption key? If that conversion is a fast one, then you better don’t expect the encryption to hold. Somebody who gets hold of that encrypted data will try to guess the password…
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