Vector Similarity Functions 3x-200x Faster than SciPy and NumPy — for Python, JavaScript, and C 11, supporting f64, f32, f16, i8, and binary vectors using SIMD for both x86 AVX2 & AVX-512 and Arm NEON & SVE 📐
active 2023-08-18 → 2026-03-17 (UTC)
Activity over time
Daily event counts in the loaded window
Line chart, 943 days from 2023-08-18 to 2026-03-17. Pushes: 1,140 total, peak 46 in a day. Pull requests: 310 total, peak 10 in a day. Issues: 213 total, peak 7 in a day. Comments: 672 total, peak 17 in a day. Stars: 1,428 total, peak 235 in a day.
- Pushes
- Pull requests
- Issues
- Comments
- Stars
Stars, PRs, issues and forks are under-captured in the later part of this window. GH Archive progressively stopped capturing non-push events during 2026 — −95% or worse by the end of the window. Every series here except Pushes fades for that reason, so a decline above reflects the archive, not this repository. Pushes stay reliable throughout, so read them, and the contributor counts derived from them, as the real signal. Data health has the measurements.
Top contributors
Pushes, PRs, issues, reviews and comments — stars and forks excluded, so this is contribution rather than popularity
| Contributor | Contributions | Pushes | PRs | Comments |
|---|---|---|---|---|
| ashvardanian | 1.9K | 1.1K | 239 | 373 |
| sroussey | 47 | 0 | 10 | 30 |
| MarkReedZ | 44 | 0 | 8 | 28 |
| GoWind | 30 | 0 | 5 | 20 |
| FlipFloop | 20 | 0 | 1 | 15 |
| jimthompson5802 | 14 | 0 | 2 | 11 |
| ChillFish8 | 14 | 0 | 1 | 12 |
| Spixmaster | 13 | 0 | 2 | 6 |
| Charlyo | 11 | 0 | 0 | 8 |
| GovindarajanNagarajan-TomTom | 10 | 0 | 0 | 6 |
| Wyctus | 10 | 0 | 1 | 9 |
| mgorny | 9 | 0 | 3 | 3 |
| corani | 9 | 0 | 2 | 6 |
| real-eren | 8 | 0 | 3 | 5 |
| cbornet | 8 | 0 | 1 | 5 |
| pplanel | 8 | 0 | 2 | 5 |
| MBkkt | 8 | 0 | 1 | 3 |
| rschu1ze | 7 | 0 | 1 | 3 |
| alexanderchang1 | 7 | 0 | 1 | 5 |
| alexbowe | 6 | 0 | 0 | 3 |
Recent activity
Latest issues, pull requests and releases
- Issue comment#308ashvardanian2026-03-08 10:08Feature: Hardening E4M3, E5M2, F16, & BF16 dot-products
- Issue#294ashvardanian2026-03-07 14:45Bug: macOS prebuilds missing from npm package since v6.4.6 (artifact upload race condition)
- Issue#305ashvardanian2026-03-07 14:45Bug: If the C build just fails to build at all, the rust component doesn't fail to build
- Issue comment#294ashvardanian2026-03-07 14:42Bug: macOS prebuilds missing from npm package since v6.4.6 (artifact upload race condition)
- Issue comment#305ashvardanian2026-03-07 14:36Bug: If the C build just fails to build at all, the rust component doesn't fail to build
- Issue#295ashvardanian2026-03-07 14:16Bug: avx2vnni target attribute not recognized by GCC and Clang (should be avxvnni)
- Pull request#306alexey-milovidov2026-03-07 06:44
- Issue#305vlovich2026-03-06 01:48Bug: If the C build just fails to build at all, the rust component doesn't fail to build
- Issue comment#242ashvardanian2026-03-04 21:36Initial WASM support.
- Pull request#300markusalbertgraf2026-03-03 16:42
- Issue comment#220markusalbertgraf2026-03-01 19:46v7: ⬆️ 1,500+ Kernels for Mixed Precision Numerics on x86, Arm, and RISC-V CPUs
- Issue comment#300ashvardanian2026-02-28 23:03Add FreeBSD to target selection.
- Pull request#300markusalbertgraf2026-02-28 08:38
- Issue#299ashvardanian2026-02-18 13:36Feature: SIMD-accelerated random generators
- Issue comment#28ashvardanian2026-02-17 13:33GoLang bindings
- Issue comment#189ashvardanian2026-02-17 12:21Feature: How is WASM Compiled? Are you using wasm_simd128 and msimd128 ?
- Issue comment#206ashvardanian2026-02-17 12:14Detect Overflows
- Issue#248ashvardanian2026-02-17 12:01Feature: mean of the array `np.mean` => `simsimd.mean`
- Pull request#297sodre2026-02-16 07:13
- Issue#295SeungWonYang-pro2026-02-02 03:44Bug: avx2vnni target attribute not recognized by GCC and Clang (should be avxvnni)
- Issue comment#290tenzap2026-01-06 11:32Bug: unit test failures on s390x
- Pull request#293ashvardanian2025-12-20 23:22
- Pull request#292ejaasaari2025-12-19 19:52
- Pull request#292ejaasaari2025-12-19 12:59
- Pull request#291ashvardanian2025-12-18 14:45
Totals cover only the window loaded into ClickHouse and count events, not GitHub's lifetime totals — 1,428 stars here means stars gained during the window, not the repo's star count.