http://bluebugs.github.io/tags/tutorial/Recent content in Tutorial on Cedric BailHugoen-usWed, 15 Apr 2026 10:01:00 -0700http://bluebugs.github.io/blogs/writing-spmd-go/Wed, 15 Apr 2026 10:01:00 -0700http://bluebugs.github.io/blogs/writing-spmd-go/<p>You have read the short version: a base64 decoder in 40 lines of Go that runs at ~17 GB/s on AVX2, about 9x faster than <code>encoding/base64</code> and within 77% of the best C++ SIMD library. If that got your attention, this article is where you learn how to write code like that yourself.</p> <p>This is written against the proof of concept in this repository, not upstream Go. The aim is practical: explain the mental model that made the examples fast, and explain the mistakes that made some of them slow.</p>