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Write your own Virtual CPU in C++ (2014)
I've previously covered writing my own virtual CPU , but I never really fleshed it out and it was never a real thing... For a while, wel...
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The latest blog posts to take off on Hacker News. 21,833 posts.
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A Little Clojure
This expression: (1 2) represents the list containing the integers 1 and 2 in that order. If you want an empty list, that’s just () . And the list of the first five letters of the alphabet is just (\a \b \c \d \e) .
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Io_uring By Example: cat, cp and a web server with io_uring
io_uring is a clever new, high-performance interface for asynchronous I/O for Linux without the drawbacks of the aio set of APIs. In this 3-part article series, we look at how to use io_uring to ge…
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Doing a math assignment with the Lean theorem prover
Note: this post was written for Lean 3; the latest version, Lean 4, is a very different language. Turn back the clock to 2009: a confused physics major newly infatuated with math and computer science, I enrolled in MATH 273: Numbers and Proofs at the University of Calgary. This wasn’t my first encounter with…
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Crafting “Crafting Interpreters”
It took three years and 200,000 words more than I expected, but my second book, Crafting Interpreters , is complete. I finished the third draft of the last chapter today, marking the last of around 1,400 days of continuous writing.
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My Favourite Diff
I want to tell the story of one of my favourite diffs I’ve ever committed. It’s probably not the “best” by any objective measure, but it’s a personal favourite and makes for a good story to boot.
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The Adventures of OS: Starting a Process
I have taught operating systems at my university, so I will link my notes from that course here regarding processes.
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How to trim video clips instantly without reencoding
How to save hours by trimming videos without reencoding or rerendering.
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Windows 10 Hosted App Model
In Windows 10 version 2004, we are introducing the concept of Hosted Apps to the Windows App Model. Hosted apps are registered as independent apps on Windows, but require a host process in order to run. An example would be a script file which requires its host (eg: Powershell or Python) to be installed. By
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How We reduced our Google Maps API cost
Being a highly reliable commute partner to our customers, we at Cityflo take all kinds of measures to ensure high accuracy and predictability of our vehicle tracking system. Showing incorrect arrival time to our users will heavily hamper the experience that our users expect from us.
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PostgreSQL is the worlds’ best database
Experience zero data sprawl with EDB Postgres AI. Capable of handling 30B+ trades a day and managing 50 TB.
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What the Heck Is Pyproject.toml?
Recently on Twitter there was a maintainer of a Python project who had a couple of bugs filed against their project due to builds failing (this particular project doesn't provide wheels, only sdists). Eventually it came out that the project was using a pyproject.toml file because that's
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State Machines in Rust
Every now and then I like to think about topics that don't directly relate to my daily work. One of those topics has been parsers: back in January I wrote about byte-ordered stream parsing and how I think we can improve streaming parsing in Rust with a small set of API additions.
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Simdjson 0.3: Faster JSON parser
Last year (2019), we released the simjson library. It is a C++ library available under a liberal license (Apache) that can parse JSON documents very fast. How fast? We reach and exceed 3 gigabytes per second in many instances. It can also parse millions of small JSON documents per second. The new version is much ……
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Prisma 2.0 Beta: Type-safe Database Access
Prisma 2 Beta introduced type-safe database access with Prisma Client, updated docs, and a clearer path toward production readiness.
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Eclipse Theia 1.0 – Open-Source Alternative to Visual Studio Code
The Eclipse Foundation - home to a global community, the Eclipse IDE, Jakarta EE and over 415 open source projects, including runtimes, tools and frameworks.
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Cognitive Biases in Software Development
A couple of years ago, I started my first job as a programmer. On the first day, I entered the office, sat in my new chair, turned on the computer, checked out a project from the version control system and opened it in IDE. The first-ever piece of the code I saw looked like that: // TODO it works, but it's ugly…
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Writing an OS in Rust: Async/Await
In this post, we explore cooperative multitasking and the async/await feature of Rust. We take a detailed look at how async/await works in Rust, inclu…
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Towards Crystal 1.0
Currently the main goal of the Crystal core team is to reach 1.0 in the near future. Since achieving that goal involves a number of non-obvious tradeoffs, we want to use this post to shed some light on those inherent tensions and how they drive our work and priorities for the next few releases.