fastutil extends the Java™ Collections Framework by providing type-specific maps, sets, lists and queues.
active 2023-08-16 → 2026-07-22 (UTC)
Activity over time
Daily event counts in the loaded window
Line chart, 1072 days from 2023-08-16 to 2026-07-22. Pushes: 36 total, peak 6 in a day. Pull requests: 38 total, peak 6 in a day. Issues: 79 total, peak 10 in a day. Comments: 261 total, peak 20 in a day. Stars: 404 total, peak 10 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 |
|---|---|---|---|---|
| vigna | 192 | 36 | 16 | 104 |
| mouse0w0 | 47 | 0 | 6 | 31 |
| incaseoftrouble | 28 | 0 | 0 | 24 |
| viciscat | 24 | 0 | 2 | 19 |
| magicprinc | 16 | 0 | 5 | 10 |
| MukjepScarlet | 11 | 0 | 0 | 8 |
| mhansen | 11 | 0 | 1 | 8 |
| frajt | 10 | 0 | 0 | 8 |
| barakugav | 9 | 0 | 3 | 5 |
| catap | 8 | 0 | 1 | 6 |
| 1341005547 | 5 | 0 | 0 | 0 |
| joycebrum | 5 | 0 | 1 | 2 |
| jmr | 4 | 0 | 2 | 2 |
| gengjun-git | 4 | 0 | 0 | 2 |
| dadlefish | 3 | 0 | 0 | 1 |
| techsy730 | 3 | 0 | 0 | 2 |
| pburka | 3 | 0 | 0 | 3 |
| rionda | 3 | 0 | 0 | 2 |
| bob7l | 3 | 0 | 0 | 1 |
| Nightenom | 3 | 0 | 0 | 2 |
Recent activity
Latest issues, pull requests and releases
- Issue comment#378rionda2026-04-02 18:41Why is adding SEGMENT_MASK needed in the "idiomatic" loops with an offset and a length?
- Issue comment#377vigna2026-03-11 14:17OpenHash remove compaction revisit
- Issue#376solonovamax2025-12-25 23:43Case insensitive string maps
- Issue comment#374MukjepScarlet2025-12-17 10:34Add JSpecify annotations
- Issue comment#374MukjepScarlet2025-12-17 10:03Add JSpecify annotations
- Issue#374MukjepScarlet2025-12-17 08:25Add JSpecify annotations
- Issue comment#373mhansen2025-12-03 02:28IntArrayList.ensureCapacity(size) should treat n as a minimum size and grow exponentially if called repeatedly
- Issue comment#373mhansen2025-12-01 23:12IntArrayList.ensureCapacity(size) should treat n as a minimum size and grow exponentially if called repeatedly
- Issue#373vigna2025-12-01 09:59IntArrayList.ensureCapacity(size) should treat n as a minimum size and grow exponentially if called repeatedly
- Issue comment#373vigna2025-12-01 09:59IntArrayList.ensureCapacity(size) should treat n as a minimum size and grow exponentially if called repeatedly
- Issue#336mhansen2025-12-01 05:15Feature Request: Implement Object2DoubleOpenHashMap.mergeDouble to avoid double-hashing
- Issue#372MukjepScarlet2025-10-29 13:46Feature request: Object2IntMap.putAll(Object2IntMap) instead of Object2IntMap.putAll(Map<K, Integer>)
- Issue#371InI42025-10-28 10:38Feature Request: Object2DoubleMap.replaceAllDouble(), .computeIfPreset()
- Issue comment#82viciscat2025-10-06 20:24compute method on primitive maps cause boxing/unboxing
- Issue comment#369vigna2025-10-05 20:34Type specific Map#foreach
- Issue#362vigna2025-10-05 20:21Unexpectedly large performance difference when using default vs. pre-sized
- Issue comment#369vigna2025-10-05 16:28Type specific Map#foreach
- Issue comment#369viciscat2025-10-05 16:24Type specific Map#foreach
- Issue comment#369viciscat2025-10-05 15:41Type specific Map#foreach
- Issue comment#369vigna2025-10-05 15:38Type specific Map#foreach
- Issue comment#369viciscat2025-10-04 17:01Type specific Map#foreach
- Issue comment#82pburka2025-10-04 15:30compute method on primitive maps cause boxing/unboxing
- Issue comment#369vigna2025-10-03 11:38Type specific Map#foreach
- Issue comment#82viciscat2025-10-02 19:03compute method on primitive maps cause boxing/unboxing
- Issue comment#362p3rmiashkin2025-10-01 19:38Unexpectedly large performance difference when using default vs. pre-sized
Totals cover only the window loaded into ClickHouse and count events, not GitHub's lifetime totals — 404 stars here means stars gained during the window, not the repo's star count.