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Top 23 Rust Simd Projects
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hora
🚀 efficient approximate nearest neighbor search algorithm collections library written in Rust 🦀 .
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Project mention: Scan HTML even faster with SIMD instructions (C++ and C#) | news.ycombinator.com | 2024-07-20
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Project mention: SIMD-friendly algorithms for substring searching | news.ycombinator.com | 2025-06-14
The "AVX2 (generic)" approach is roughly what ripgrep uses (via Rust's `regex` crate) to accelerate most searches. Even something like `\w+\s+Sherlock\s+\w+` will benefit since ripgrep will pluck `Sherlock` out of the regex and search that.
The actual implementation is here: https://github.com/BurntSushi/memchr?tab=readme-ov-file#algo...
The main difference with the algorithm presented here is that instead of always using the first and last bytes of the needle, a heuristic is used to try to pick two bytes that occur less frequently according to a background frequency distribution.
It ends up being quite a bit faster than just plain Two-Way or even GNU libc's implementation of `memmem`. From the root of the `memchr` repository:
$ rebar rank benchmarks/record/x86_64/2023-12-29.csv -e '^rust/memchr/memmem/(oneshot|prebuilt|twoway)' -e '^libc/memmem/oneshot' -
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There's a debate on how unsafe/unsound this technique actually is. https://github.com/ogxd/gxhash/issues/82
I definitely see the conundrum since the dangerous code is such a huge performance gain.
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PhastFT
A high-performance, "quantum-inspired" Fast Fourier Transform (FFT) library written in pure and safe Rust.
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SIMD-itertools
Faster implementations of standard library operations like find, filter, position etc.
Project mention: SIMD-itertools: vectorized iterators for "find", "filter", "contains", etc. | news.ycombinator.com | 2024-07-15 -
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neural-network-from-scratch
A neural network library written from scratch in Rust along with a web-based application for building + training neural networks + visualizing their outputs
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varint-simd
Decoding and encoding gigabytes of LEB128 variable-length integers per second in Rust with SIMD
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less_slow.rs
Playing around "Less Slow" coding practices in Rust, from numerical micro-kernels to coroutines, ranges, and polymorphic state machines
Most hardware-level observations, like the latency of various memory accesses or numeric operations, would be the same for the Rust code. As for higher-level abstractions, I've already started porting them to Rust <https://github.com/ashvardanian/less_slow.rs>.
Next, it would be exciting to implement a concurrent job-stealing graph algorithm in both languages to get a feel for their ergonomics in non-trivial problems. I can imagine it looks very different in Rust and C++, but before I get there, I'm looking for best practices for implementing nested associative containers with shared stateful allocators in Rust.
In C++, I've implemented them like this: <https://github.com/ashvardanian/less_slow.cpp/blob/8f32d65cc...>, even though I haven't seen many people doing that in public codebases. Any good examples for Rust?
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SaaSHub
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NOTE:
The open source projects on this list are ordered by number of github stars.
The number of mentions indicates repo mentiontions in the last 12 Months or
since we started tracking (Dec 2020).
Rust Simd discussion
Rust Simd related posts
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The messy reality of SIMD (vector) functions
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SIMD-friendly algorithms for substring searching
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Scan HTML even faster with SIMD instructions (C++ and C#)
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vu128: Efficient variable-length integers
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Fast Fourier Transform in Rust
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Ton Coin CKB-AUTH Integration
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GDlog: A GPU-Accelerated Deductive Engine
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A note from our sponsor - Stream
getstream.io | 13 Jul 2025
Index
What are some of the best open-source Simd projects in Rust? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | hora | 2,638 |
| 2 | glam-rs | 1,745 |
| 3 | faster | 1,579 |
| 4 | uwu | 1,401 |
| 5 | simd-json | 1,282 |
| 6 | cgmath-rs | 1,176 |
| 7 | rust-memchr | 1,153 |
| 8 | gxhash | 933 |
| 9 | sonic-rs | 646 |
| 10 | stdarch | 641 |
| 11 | simdutf8 | 555 |
| 12 | wide | 389 |
| 13 | simd | 232 |
| 14 | multiversion | 228 |
| 15 | PhastFT | 219 |
| 16 | SIMD-itertools | 177 |
| 17 | thermite | 154 |
| 18 | neural-network-from-scratch | 133 |
| 19 | varint-simd | 124 |
| 20 | less_slow.rs | 115 |
| 21 | rsonpath | 97 |
| 22 | sliceslice-rs | 96 |
| 23 | faster-hex | 92 |
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