# Fearless SIMD

8 Hacker News commenters recommended Fearless SIMD and 0 criticized it, November 2025 to November 2026. It was recommended in 3 of 13 months.

**Verdict:** Portable SIMD library for Rust that runs on stable, letting developers use CPU vector performance without writing their own low-level code.

## Why people recommend it

- Portable SIMD that runs on stable Rust (2 comments): "we had to switch to the fearless_simd crate in order to get a portable SIMD solution that works on stable" ([source](https://news.ycombinator.com/item?id=49249354)) "Fearless SIMD is what finally allowed my FFT crate, PhastFT, to run on stable Rust" ([source](https://news.ycombinator.com/item?id=49837285))
- Ergonomic access to CPU performance (2 comments): "Tools like this are really nice for being able to leverage the gigantic performance modern CPUs make available" ([source](https://news.ycombinator.com/item?id=49834780)) "enabling your extreme optimization use case, just more ergonomically" ([source](https://news.ycombinator.com/item?id=49871062))
- No need to write SIMD yourself (2 comments): "Fearless SIMD 1.0 came out a few days ago so people won't have to implement it themselves anymore." ([source](https://news.ycombinator.com/item?id=49881417)) "if you're looking to add SIMD to your Rust code, that's the package to start with." ([source](https://news.ycombinator.com/item?id=49012986))

## Alternatives hackers recommend

- [Google Highway](https://hackerapproved.com/p/highway.md): 15 recommend
- [std::simd](https://hackerapproved.com/p/std-simd.md): 13 recommend

## Cite as

Hacker Approved, "Fearless SIMD", https://hackerapproved.com/p/fearless-simd/ (counts from 1,795,640 Hacker News comments, November 2025 to November 2026).