18th December 2025 - Link Blog
swift-justhtml. First there was Emil Stenström's JustHTML in Python, then my justjshtml in JavaScript, then Anil Madhavapeddy's html5rw in OCaml, and now Kyle Howells has built a vibespiled dependency-free HTML5 parser for Swift using the same coding agent tricks against the html5lib-tests test suite.
Kyle ran some benchmarks to compare the different implementations:
- Rust (html5ever) total parse time: 303 ms
- Swift total parse time: 1313 ms
- JavaScript total parse time: 1035 ms
- Python total parse time: 4189 ms
Recent articles
- Changes in the system prompt between Claude Opus 4.6 and 4.7 - 18th April 2026
- Join us at PyCon US 2026 in Long Beach - we have new AI and security tracks this year - 17th April 2026
- Qwen3.6-35B-A3B on my laptop drew me a better pelican than Claude Opus 4.7 - 16th April 2026