Marcus Lewis

We traded the physical boundaries of dedicated rooms for the convenience of our always-on digital lives -- but recently I've been building those walls back up.

A game jam from 2026-07-01 to 2026-08-01 hosted by Internet Janitor. Summer is upon us. The weather is hot, but pixels are cooler than ever. Pack your bags with swim trunks, mosquito repellent, animated GIFs, plenty of...

A Game Boy emulator that runs faster than a native interpreter by dynamically recompiling SM83 to WebAssembly, effectively making JIT possible on iOS.

For years, rightsholders have pushed for broader site blocking orders, with no direct liability for overblocking. EuroISPA want to change that.

Tracing one vector-add kernel from nvcc all the way down to the warps that execute it.

Law enforcement’s use of warrants sweeping smartphone location data requires privacy protections, court rules

Aspect Oriented Programming's language of concerns and weaving fit well into the emerging world of vibe coding.

Samsung, SK hynix and Micron face a US lawsuit alleging memory price fixing that drove D-RAM prices up 700% over four years, with consumers seeking class-action status.

Artworks from an era when Venetians brawled on bridges.

I ran HackerRank's open-source ATS on my resume 100 times. Same resume, different score every time. Here's why.

Thomas Dullien’s guide to software and SaaS B2B entrepreneurship.

Hyprland Noctalia, DNS-over-QUIC, GCC Branch Prediction

Back in the day when Principia originally released for Windows in 2014, the game would run on versions as far back as Windows XP. Given that Principia 1.4 was released while Windows XP still had mainstream support, this of course made sense at the time, and there was no real reason not to support it given that the tooling and dependencies at the time were still compatible with it. Fast forward to today with Principia as an open source project. While the Windows version should still run as far back as Windows 7, our usage of modern toolchains, dependencies and system libraries such as UCRT means that hard to truly guarantee far into the future as the ecosystem moves forward. However, this has always been something I wanted to change one day, bringing Principia back onto Windows XP and producing a fully open source build of the game that can run on it.

In 2022, I wrote about the damning fall of events tech company Pollen. The short of it: Pollen seemed to have pulled off the improbable feat of building a business in the notoriously low margin industry of events, surviving Covid-19, and building a solid software engineering organization. In April

Lots of US states, European countries, and Australia have introduced "age verification" regulations. They present it as the classic "save the children" talking ...

WINDOW JOIN is QuestDB's dedicated syntax for aggregating one table over a time window around each row of another. We parallelized it across page frames, used a low-cardinality join key to unlock a vectorized aggregation path, and benchmarked it against Timescale, DuckDB, and ClickHouse on a 50M x 150M row workload.

That's absolutely sad to read. The CEO of @mullvadnet@mastodon.online is not only financing the far-right Swedish Örebro party, but he even is their main financer. 70+% of their money is his donation. He is the reason why they go nationwide this year. For obvious reasons i cease to trust this service. Also i do not finance parties that aim for forced deportations. https://www.flamman.se/techprofil-ger-miljoner-till-orebropartiet/ #Mullvad

Why two identical VMs on the same host can perform 20% differently — and what NUMA topology in Xen-based virtualization actually costs you.

Among models given nothing but a prompt, the best open-weight option beat Claude Opus 4.8.

At WWDC 2025, Apple announced macOS 26 Tahoe. One of the new features in macOS Tahoe is a new disk image format: ASIF. Designed for use with virtual machines (its documentation lives under the Virtualization framework), ASIF takes a lot of inspiration from existing virtual disk formats. Practically, that means it’s another sparse virtual disk format, and functions very similar to sparse VMDK, VHDX or QCOW2 files (for the uninitiated, it allow you to store a large disk, or file, in a smaller, “sparse” manner).

A neat technique for defining a non-empty string constructor in Haskell.

By rearchitecting the Images binding, we accidentally uncovered a bug that existed in the open-source hyper library across multiple major versions.