roaringbitmap
https://github.com/roaringbitmap/roaringbitmap
Java
A better compressed bitset in Java
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- Issues
- Add reverse batch iteration for heap and mapped bitmaps
- Add compressed offset operation for Roaring64Bitmap
- Roaring64NavigableMap.clone loses signed ordering in portable serialization mode
- Preserve signed ordering when cloning Roaring64NavigableMap
- Avoid copying bitmap containers during unions
- Avoid full cardinality repair for small array unions
- Reset cached cardinalities after lazy repair
- Add PersistentRoaringBitmap: bitmap versions that share containers, copied on write
- Equal bitmaps can have different `hashCode()` values when their containers are encoded differently
- Make `hashCode` independent of the container encoding
- Docs
- Java not yet supported