bitmap-index

Rust library implementing xor-filters

Cuckoo Index: A Lightweight Secondary Index Structure

A fast embedded+server columnar database with SQL, vector search, full-text search, and AI-native retrieval. Dozens of languages supported. Written in Rust.

A Bitmap library (think BitArray, BitVector32, or Bit Index, not bmp) written in C# with more functionality than the .NET default.

High-performance in-memory bitmap index engine for Rust. Sub-millisecond filtering and sorting for millions of structured documents using Roaring Bitmaps.

Efficient TypeScript bitmap indexing library for set operations and bitmasking.

单文件嵌入式存储（Node/TS）：KV、位图索引业务表、大 body 同住一个文件。组提交，零运行时依赖。位图查询 8µs，区间查询命中 0 行 0.02ms

A (not so) serious OLAP database engine written in Python. Columnar storage, dictionary encoding, and Roaring Bitmap indexes, small enough to read.

A network packet analyzer with a SQL query engine, built from scratch in Python — hand-parsed packet headers (IP-checksum verified), columnar storage, trie/hash/bitmap indexes, a ring-buffer capture pipeline, and a binary-protocol TCP server.

Distributed bitmap indexing and querying

Bitmap index codec for the numcodecs buffer compression API

记录学习点滴，分享技术干货

A RDBMS with bitmap index support simulation with Java.

Useful operations for bitmap indexes and run-length encoded bitmaps.

In-memory MVCC database on immutable radix trees, with a typed API and bitmap indexes

High-performance sparse bitset implementation using VEB trees

Academic database project: bitmap-based query execution for star schemas with custom bitmap structures.

An immutable in-memory selection index for typed columns, evaluating bounded predicate trees with SQL-style true, false and unknown masks. SQLite oracle tests verify null semantics independently of the bitmap implementation.