Fearless SIMD in Rust: Seven Years On

Seven years ago, a blog post outlined a vision for Rust as a compelling language for writing fast SIMD programs. Today, while progress has been made, the experience remains rough. This post explores the challenges of SIMD programming in Rust, focusing on safety concerns, multi-versioning strategies, and future directions. It compares approaches like `std::simd`, `pulp`, and the author's `fearless_simd` prototype, advocating for a collaborative effort within the Rust community to build robust SIMD infrastructure comparable to Highway.