Reading / 2026-05/2026-05-14t151252-5-faster-fastblur-in-image-rs
5× faster fast_blur in image-rs
Step-by-step optimization of Rust's image-rs fast_blur function, replacing float arithmetic with integer accumulators and costly integer division with reciprocal multiplication to achieve a 5.9× speedup on u8 images.
May 14, 2026 · tech · Arthur Pastel
Topics
- benchmarks
- engineering-craft
- open-source
- systems-design
- software-engineering
Cited by
- Benchmarks
Benchmarks measure model or system capability, but their results are only as meaningful as their design — a recurring problem across LLM, multi-agent, and vision tasks, where tests built for one context are routinely applied to contexts they cannot capture.
- Engineering craft
Engineering craft is the accumulated discipline of writing, organizing, and maintaining software well — spanning code design, tooling fluency, communication, and the judgment to know when technical excellence actually changes outcomes.
- Open source
Open source spans infrastructure, tooling, security risk, and platform trust — the cited sources collectively show it as a foundation for local AI, developer tooling, and code forges, with its benefits shadowed by real supply-chain and stewardship threats.
- Software engineering
Software engineering spans craft, process, and judgment — how code is structured, tested, reviewed, deployed, and maintained — and the sources collected here collectively interrogate each layer as AI tooling reshapes who does what and why.
- Systems design
Systems design spans how components are structured, isolated, and coordinated to handle real-world complexity, covering tradeoffs in state management, failure recovery, module boundaries, and the diagrams used to communicate it all.
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