The Model's Version Was Better and Taught Me Less deep dive
I turned autocomplete off for an evening, wrote a small config parser by hand, then compared it with the model's version, and the ordering mattered more than the tool.
Dev Tools & Engineering
Languages, algorithms, and the constraints underneath
Languages, algorithms, formal methods, and the unglamorous engineering that makes software fast. The interesting part is almost never the framework — it is the constraint somebody worked around to ship it.
Start here
Why Explicit Types Reduce Cognitive Load in Code deep dive
A test of whether removing type declarations helps or hurts the reader.
Anthropic Replaced Git in Five Months as Merges Hit 30,000 a Day
Anthropic built its own version control system, Scion, and moved its monorepo off git in five months after merges per day grew past 30,000.
Cloudflare Acquires the Deno Team; Deno Deploy Is the Loose End
Cloudflare is absorbing the entire Deno team and folding its roadmap into Workers and celld, leaving Deno Deploy users with a hosted service no one has committed to.
Janet's 32-Bit Pointer Test: Real RAM Win, Missing Packaging
Janet built with 32-bit pointers saved about 20 percent of its memory and lost 50 percent of its speed; the x32 ABI would keep the cache win without that cost, but Arch doesn't compile it in and Debian ships it disabled.
A 1989 Paper Doubled Dynamic Language Speed by Guessing Types
A 1989 paper for the Self language compiled one copy of each procedure per receiver type, verified the guess at runtime, and doubled dynamic language performance.
Everything else here
- Edison Design Group Open-Sources Its C++ Front End
- An Undocumented iPod Chip, 256 Register Values, and a Working Driver
- Cloudflare Ships Vary Support in Cache Rules on Every Plan
- Miri Wrote Every Environment Variable to target/, and CI Cached It
- Git 2.56 Hits Release Candidate, and 3.0 Hinges on GitHub
- Skia, Formalized in Lean, and 18.7% Faster Rasterization
- 288 Fillings, Twelve 4x4 Sudokus Once You Relabel
- Bitap: Packing String Matching into One Bit Operation
- 329 billion requests, one Black Friday