bifurcan

Benchmarks show Bifurcan's union, intersection, and difference operations significantly outperform other libraries, as detailed in its in-depth comparison documentation.

Updates return new collections, enabling thread-safe sharing and local reasoning without side effects, which is core to its design philosophy.

Contiguous memory layout allows iteration over map entries to be up to 20x faster than java.util.HashMap for large collections, as cited in benchmark images.

Linear and forked modes provide temporary mutability for performance gains in linear dataflows, balancing safety and efficiency without full immutability overhead.

Maps and sets support custom hash and equality semantics, allowing tailored behavior beyond standard Java collections, as seen in LinearMap and Map implementations.