The best simd libraries, according to hackers
3 simd libraries were recommended on Hacker News between November 2025 and November 2026. We rank them by how many separate people recommend each one, and 1 earns the Hacker Approved badge.
Top pick
The most recommended simd library with the badge. Each figure is one person. RecommendsCriticizes One comment
Portable SIMD across CPUs
Portable SIMD library that lets one binary use AVX2 or AVX-512 when available and still run on CPUs without them. Critics find its runtime dispatch and abstraction layer elaborate and bulky.
All 3 simd libraries, ranked
Select a column heading to sort. Approval share is recommenders out of everyone who gave an opinion; the tick on each bar marks the 2 to 1 line the badge needs. Months counts the months, out of 13, in which someone recommended it.
| Rank | |||||||
|---|---|---|---|---|---|---|---|
| 1 | Google Highway | 15 | 5 | 75% | 8 | — | Approved |
| 2 | std::simd | 13 | 13 | 50% | 4 | — | — |
| 3 | Fearless SIMD | 8 | 0 | 100% | 3 | — | — |
How we rank
Rank is the number of separate people who recommend a product in a Hacker News comment over the past year. Someone who praises the same simd library in five threads counts once.
The badge goes to simd libraries that at least 10 people recommend, with recommenders outnumbering critics at least 2 to 1, recommended in at least 4 of the 13 months.
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