1.FareedKhan-dev / kimi-k3-in-c
A 2.78-trillion-parameter Kimi K3 running inference on a single CPU in 8.24 GB of RAM. Portable C99: no BLAS, no framework, no GPU.
+89 stars
from 9,186 · score 4.50
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10 repositories by Attention Score · Oct 27, 2026 – Nov 2, 2026 (UTC)
2.simdjson / simdjson
Parsing gigabytes of JSON per second : used by Facebook/Meta Velox, the Node.js runtime, ClickHouse, WatermelonDB, Apache Doris, Milvus, StarRocks
+33 stars
from 24,461 · score 3.53
3.coregx / coregex
Pure Go production-grade regex engine with SIMD optimizations. Up to 3-3000x+ faster than stdlib.
+11 stars
from 292 · score 2.48
4.simdutf / 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.
+7 stars
from 2,003 · score 2.08
5.simd-everywhere / simde
Implementations of SIMD instruction sets for systems which don't natively support them.
+5 stars
from 3,136 · score 1.79
6.RoaringBitmap / CRoaring
Roaring bitmaps in C (and C++), with SIMD (AVX2, AVX-512 and NEON) optimizations: used by Apache Doris, ClickHouse, Alibaba Tair, Redpanda, YDB and StarRocks
+4 stars
from 1,899 · score 1.61
7.microsoft / DirectXMath
DirectXMath is an all inline SIMD C++ linear algebra library for use in games and graphics apps
+3 stars
from 1,814 · score 1.39
8.numpy / x86-simd-sort
C++ template library for high performance SIMD based sorting algorithms
+3 stars
from 1,030 · score 1.39
9.VcDevel / Vc
SIMD Vector Classes for C++
+2 stars
from 1,548 · score 1.10
10.nihilai-collective / Jsonifier
A few classes for extremely fast json parsing/serializing in modern C++. Possibly the fastest json parser in C++. Possibly the fastest json serializer in C++.
+1 stars
from 102 · score 0.69