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Top 19 C++ Neon Projects
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simdjson
Parsing gigabytes of JSON per second : used by Facebook/Meta Velox, the Node.js runtime, ClickHouse, WatermelonDB, Apache Doris, Milvus, StarRocks
Project mention: GigaToken: ~1000x faster Language model tokenization | news.ycombinator.com | 2026-07-22 -
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mace
MACE is a deep learning inference framework optimized for mobile heterogeneous computing platforms.
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Project mention: Adding 70-language translation to an image API without paying per word | dev.to | 2026-06-09
Runtime: CTranslate2 with int8 quantization. This is the key piece. It shrinks the model to ~1.3 GB and runs CPU inference fast. Do not run raw transformers on CPU for this.
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xsimd
C++ wrappers for SIMD intrinsics and parallelized, optimized mathematical functions (SSE, AVX, AVX512, NEON, SVE, WebAssembly, VSX, RISC-V))
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Simd
C++ image processing and machine learning library with using of SIMD: SSE, AVX, AVX-512, AMX for x86/x64, NEON, SVE for ARM, HVX for Hexagon (by ermig1979)
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fast_float
Fast and exact implementation of the C++ from_chars functions for number types: 4x to 10x faster than strtod, part of GCC 12, MySQL, DuckDB, Chromium, Redis and WebKit/Safari
Project mention: fast_float VS str2num - a user suggested alternative | libhunt.com/r/fast_float | 2026-06-06 -
simdutf
Unicode routines (UTF8, UTF16, UTF32) and Base64: billions of characters per second using SSE2, AVX2, NEON, AVX-512, RISC-V Vector Extension, LoongArch64, POWER. Part of Node.js, WebKit/Safari, Ladybird, Chromium, Cloudflare Workers, Ghostty and Bun.
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ada
WHATWG-compliant and fast URL parser written in modern C++, part of Internet Archive, Node.js, Clickhouse, Redpanda, Kong, Telegram, Adguard, Datadog and Cloudflare Workers.
Project mention: Ada: Whatwg-compliant and fast URL parser written in modern C++ | news.ycombinator.com | 2026-05-30 -
DirectXMath
DirectXMath is an all inline SIMD C++ linear algebra library for use in games and graphics apps
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Every port I've done to a new hardware or software platform has shaken loose at least a handful of bugs or assumptions that are well worth ironing out. And in the case of a port to Apple Silicon, you get a very fast development environment at the end of it. This library also helped with 90% of the work:
https://github.com/DLTcollab/sse2neon
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Project mention: Eve: Expressive Vector Engine – SIMD in C++ Goes Brrrr | news.ycombinator.com | 2026-04-09
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MIPP
Portable wrapper for SIMD and vector instructions written in C++11. Compatible with NEON, SSE, AVX, AVX-512 and SVE (length specific).
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ParallelReductionsBenchmark
Thrust, CUB, TBB, AVX2, AVX-512, CUDA, OpenCL, OpenMP, Metal, and Rust - all it takes to sum a lot of numbers fast!
I was asked this a few months back but don’t have the measurements fresh anymore. In general, I think TBB is one of the more thorough and feature-rich parallelism libraries out there. That said, I just found a comparable usage example in my benchmarks, and it doesn’t look like TBB will have the same low-latency profile as Fork Union: https://github.com/ashvardanian/ParallelReductionsBenchmark/...
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C++ Neon discussion
C++ Neon related posts
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Simdutf: Fast Unicode Validation and Transcoding
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C Is Not Suited to SIMD
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Expressive Vector Engine – SIMD in C++
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A 94x speed improvement demonstrated using handwritten assembly
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SIMD-accelerated computer vision on a $2 microcontroller
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Decoding UTF8 with Parallel Extract
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Glibc Buffer Overflow in Iconv
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A note from our sponsor - SaaSHub
www.saashub.com | 13 Aug 2026
Index
What are some of the best open-source Neon projects in C++? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | simdjson | 24,147 |
| 2 | highway | 5,737 |
| 3 | mace | 5,039 |
| 4 | CTranslate2 | 4,615 |
| 5 | xsimd | 2,730 |
| 6 | Simd | 2,261 |
| 7 | fast_float | 2,083 |
| 8 | simdutf | 1,921 |
| 9 | ada | 1,789 |
| 10 | DirectXMath | 1,784 |
| 11 | Vc | 1,540 |
| 12 | sse2neon | 1,527 |
| 13 | eve | 1,356 |
| 14 | libsimdpp | 1,300 |
| 15 | hlslpp | 1,134 |
| 16 | std-simd | 653 |
| 17 | MIPP | 529 |
| 18 | ParallelReductionsBenchmark | 119 |
| 19 | fractals | 1 |