Roaring bitmaps in C (and C++), with SIMD (AVX2, AVX-512 and NEON) optimizations: used by Apache Doris, ClickHouse, and StarRocks
active 2025-03-23 → 2026-08-08 (UTC)
Activity over time
Daily event counts in the loaded window
Line chart, 504 days from 2025-03-23 to 2026-08-08. Pushes: 119 total, peak 7 in a day. Pull requests: 89 total, peak 7 in a day. Issues: 22 total, peak 2 in a day. Comments: 98 total, peak 7 in a day. Stars: 79 total, peak 3 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 |
|---|---|---|---|---|
| lemire | 190 | 91 | 32 | 47 |
| dependabot[bot] | 39 | 0 | 35 | 4 |
| github-actions[bot] | 25 | 25 | 0 | 0 |
| Dr-Emann | 24 | 0 | 4 | 12 |
| RinChanNOWWW | 19 | 0 | 0 | 13 |
| SLieve | 9 | 3 | 1 | 3 |
| Copilot | 5 | 0 | 0 | 1 |
| maxwbuckley | 4 | 0 | 0 | 2 |
| xingyaner | 3 | 0 | 1 | 2 |
| HAMTR14 | 3 | 0 | 0 | 1 |
| jwhear | 3 | 0 | 2 | 0 |
| madscientist | 2 | 0 | 0 | 0 |
| AlSchlo | 2 | 0 | 1 | 1 |
| hgarrereyn | 2 | 0 | 0 | 2 |
| adsharma | 2 | 0 | 0 | 2 |
| andreigudkov | 2 | 0 | 1 | 1 |
| buexplain | 2 | 0 | 0 | 0 |
| stereobooster | 1 | 0 | 1 | 0 |
| kathleenmotley49-maker | 1 | 0 | 0 | 0 |
| Kerollmops | 1 | 0 | 0 | 1 |
Recent activity
Latest issues, pull requests and releases
- Issue comment#859lemire2026-08-08 01:05Fix non-atomic refcount decrement
- Pull request#837stereobooster2026-06-04 19:14
- Pull request#832dependabot[bot]2026-06-03 07:56
- Pull request#832dependabot[bot]2026-06-03 07:56
- Issue comment#818lemire2026-05-29 01:39Wasm SIMD128 beyond bitsets + amalgamation wasm differential harness
- Releaselemire2026-05-12 23:26Version 4.7.0
- Pull request#810dependabot[bot]2026-05-12 17:44
- Issue comment#813lemire2026-05-12 00:20feat: Drop const from return type of c++ frozen view APIs
- Pull request#811dependabot[bot]2026-05-02 00:20
- Pull request#810dependabot[bot]2026-05-02 00:19
- Pull request#810dependabot[bot]2026-05-02 00:19
- Pull request#810dependabot[bot]2026-05-02 00:19
- Pull request#808dependabot[bot]2026-05-02 00:19
- Pull request#808dependabot[bot]2026-05-02 00:19
- Pull request#808dependabot[bot]2026-05-02 00:19
- Pull request#806andreigudkov2026-04-30 14:51
- Pull request#804k-lukas2026-04-28 00:49
- Issue comment#802lemire2026-04-22 03:23builds with Fil-C
- Issue comment#781dependabot[bot]2026-04-22 00:42Bump actions/checkout from 6.0.1 to 6.0.2
- Pull request#796dependabot[bot]2026-04-22 00:42
- Issue comment#800lemire2026-04-14 23:28Performance improvement array_container_contains()
- Pull request#794lemire2026-03-28 23:40
- Issue comment#476lemire2026-03-09 15:02[bugs] commit #452
- Pull request#791lemire2026-03-04 22:56
- Issue#790lemire2026-03-03 21:07add_many and remove_many crash with COW
Totals cover only the window loaded into ClickHouse and count events, not GitHub's lifetime totals — 79 stars here means stars gained during the window, not the repo's star count.