lacuna/bifurcan

Health v2 · maintenance only

Flags: no_releases

Adoption not part of the score

1017 stars · 55 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

Bifurcan is a Java library providing high-performance mutable and immutable (functional) data structures such as lists, maps, and sets with a common API. It offers efficient random access, inverted indices, splitting/merging, and fast batch set operations compared to standard java.util collections.

Use cases

• use immutable persistent collections in Java
• faster hash map iteration than HashMap
• efficient union, intersection, and difference of collections
• custom equality and hash semantics for collections
• functional-style collection updates returning new collections
• convert collections to read-only java.util interfaces

When to choose

• you need immutable or mutable data structures with better performance than java.util
• your workload relies heavily on batch set operations like merge or union
• you want deterministic memory layout for fast equality checks

When to avoid

• you only need simple collections and are happy with java.util
• you need collections that implement java.util interfaces natively
• you work outside the JVM

Facets

library · maturity active

serialization developer-tools programming-languages jvm data-structures immutable-collections persistent-data-structures functional-programming jvm algorithms

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