roaringbitmap
https://github.com/roaringbitmap/roaringbitmap
Java
A better compressed bitset in Java
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- Issues
- add fuzz testing
- More lazy container operations
- .map() function
- Optimize format for short bitmaps or sparse data
- streamline the implementations of iterators to drastically reduce memory allocation
- Design a highly compressed serialized format
- Parallelize
- Optimize iterators over mapped bitmaps
- thread safety
- Implement partially mapped bitmaps: hybrid Java heap + off heap
- Docs
- Java not yet supported