leventov/Koloboke

Health v2 · maintenance only

Flags: no_license

Adoption not part of the score

1017 stars · 139 forks observed · 2026-08-28

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

Koloboke is a family of Java collections projects providing primitive-specialized, high-performance implementations of maps and sets as an extension of the Java Collections Framework. It includes an implementation library and an annotation processor (Koloboke Compile) that generates collection implementations.

Use cases

• replace slow boxed Java collections with primitive-specialized maps and sets
• reduce memory footprint of large hash maps in Java
• generate custom collection implementations via annotation processing
• find a faster HashMap alternative for the JVM
• avoid autoboxing overhead in collection-heavy Java code

When to choose

• you need memory-efficient primitive-specialized collections on the JVM
• you want drop-in replacements for standard Java maps and sets with better performance
• you need generated implementations for custom collection-like interfaces

When to avoid

• you need a actively maintained library with recent releases and support
• you work outside the Java/JVM ecosystem
• you only need small collections where performance gains are negligible

Facets

library · maturity maintenance

data-science developer-tools developer-tools performance jvm java-collections primitive-specializations hashmap annotation-processor high-performance algorithms

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