Big Queue - A big, fast and persistent queue based on memory mapped file.

•    Java

---

A big, fast and persistent queue based on memory mapped file.

queue java-collections collections data-structure memory-mapped

Redisson - Redis based In-Memory Data Grid for Java

•    Java

---

Redisson - distributed Java objects and services (Set, Multimap, SortedSet, Map, List, Queue, BlockingQueue, Deque, BlockingDeque, Semaphore, Lock, AtomicLong, Map Reduce, Publish / Subscribe, Bloom filter, Spring Cache, Executor service, Tomcat Session Manager, Scheduler service, JCache API) on top of Redis server. Rich Redis client.

cache distributed-caching distributed-locks redis-client redis-cluster collections java-collections hashmap set queue

Capsule - The Capsule Hash Trie Collections Library

•    Java

---

Capsule aims to become a full-fledged (immutable) collections library for Java 8+ that is solely built around persistent tries. The library is designed for standalone use and for being embedded in domain-specific languages. Capsule still has to undergo some incubation before it can ship as a well-rounded collection library. Nevertheless, the code is stable and performance is solid.

hashmap trie immutable immutable-collections persistent-data-structure hashset performance data-structure collections map list champ

PCollections - A Persistent Java Collections Library

•    Java

---

A Persistent Java Collections Library. PCollections serves as a persistent and immutable analogue of the Java Collections Framework. This includes efficient, thread-safe, generic, immutable, and persistent stacks, maps, vectors, sets, and bags, compatible with their Java Collections counterparts.

jvm collections java-collections immutable immutable-collections data-structure

Eclipse Collections - Best Java Collection Framework

•    Java

---

Eclipse Collections is a collections framework for Java. It has JDK-compatible List, Set and Map implementations with a rich API, additional types not found in the JDK like Bags, Multimaps, and set of utility classes that work with any JDK compatible Collections, Arrays, Maps, or Strings. The iteration protocol was inspired by the Smalltalk collection framework. It maximizes the power of Java 8 Lambda expressions and method references with rich APIs directly available on your collections.

collections java-collection collections-library utility data-structure

Buckets-JS - A complete, fully tested and documented data structure library written in pure JavaScript

•    Javascript

---

Buckets is a complete, fully tested and documented data structure library written in pure JavaScript.

data-structures collections collection linked-list dictionary map multimap stack queue set bag binary-heap priority-queue binary-search binary-search-tree tree tree-structure buckets data structure linked list heap priority binary data-structure hashmap

typescript-collections - A generically typed set of collections for use with TypeScript

•    TypeScript

---

It is a complete, fully tested data structure library written in TypeScript. This project uses TypeScript Generics so you need TS 0.9 and above.

typescript generics data structures collections linked list dictionary default multi binary search tree key value stack queue set bag heap priority array

JCTools - Java Concurrency Tools for the JVM

•    Java

---

Java Concurrency Tools for the JVM. This project aims to offer some concurrent data structures currently missing from the JDK.

concurrency data-structures queues lock-free wait-free awesome collections java-collection data-structure

Paguro - Immutable Collections and Functional Transformations for the JVM

•    Java

---

Immutable Clojure collections and a Transformation abstraction for Java 8+, immutably, type-safely, and with good performance. It provide support for RRB Tree, which is an immutable List (like Clojure's PersistentVector) that also supports random inserts, deletes, and can be split and joined back together in logarithmic time.

immutable-collections rbtree kotlin jvm transformations stream data-structure collections immutable map list java-collections

bifurcan - impure functional data structures

•    Java

---

This library provides high-quality Java implementations of mutable and immutable data structures, each sharing a common API. Rather than using the existing collection interfaces in java.util such as List or Map, it provides its own interfaces (IList, IMap, ISet) that provide functional semantics - each update to a collection returns a reference to a new collection.

data-structure collections immutable map list java-collections

Agrona - Library to build high-performance applications in Java and C++

•    Java

---

Agrona provides a library of data structures and utility methods that are a common need when building high-performance applications in Java and C++. It supports Buffers, Map, Sets, Cache, Queues and lot more.

collections java-collection collections-library utility data-structure

Boon - Low Ceremony. High Productivity. A real boon to Java to developers!

•    Java

---

The main goal of Boon is to reduce the productivity delta between Java and Python/Groovy/Ruby. The idea is to just create a lower ceremony APIs. Less Java like APIs, and more getting things done quickly APIs. If reading a file takes one line of code in Ruby/Python/Groovy, then it will also in Java. If slice notation is part of those language, then Boon will have it to.

java-collections data-structure utility json-parser collections

collections - This package contains JavaScript implementations of common data structures with idiomatic interfaces

•    Javascript

---

This package contains JavaScript implementations of common data structures with idiomatic iterfaces, including extensions for Array and Object. You can use these Node Packaged Modules with Node.js, Browserify, Mr, or any compatible CommonJS module loader. Using a module loader or bundler when using Collections in web browsers has the advantage of only incorporating the modules you need. However, you can just embed <script src="collections/collections.min.js"> and all of the collections will be introduced as globals. ⚠️ require("collections") is not supported.

collections data-structures observable list set map splay

DynamicData - Reactive collections based on Rx.Net

•    CSharp

---

Dynamic Data is a portable class library which brings the power of Reactive Extensions (Rx) to collections.Rx is extremely powerful but out of the box provides nothing to assist with managing collections. In most applications there is a need to update the collections dynamically. Typically a collection is loaded and after the initial load, asynchronous updates are received. The original collection will need to reflect these changes. In simple scenarios the code is simple. However, typical applications are much more complicated and may apply a filter, transform the original dto and apply a sort. Even with these simple every day operations the complexity of the code is quickly magnified. Dynamic data has been developed to remove the tedious code of dynamically maintaining collections. It has grown to become functionally very rich with at least 60 collection based operations which amongst other things enable filtering, sorting, grouping, joining different sources, transforms, binding, pagination, data virtualisation, expiration, disposal management plus more.

reactive-extensions reactive-collections rx dynamic-data c-sharp rx-observable

immutable - Immutable collections for Go

•    Go

---

This repository contains immutable collection types for Go. It includes List, Map, and SortedMap implementations. Immutable collections can provide efficient, lock free sharing of data by requiring that edits to the collections return new collections. The collection types in this library are meant to mimic Go built-in collections such asslice and map. The primary usage difference between Go collections and immutable collections is that immutable collections always return a new collection on mutation so you will need to save the new reference.

immutable collections

gs-collections - A supplement or replacement for the Java Collections Framework

•    Java

---

GS Collections is a collections framework for Java. It has JDK-compatible List, Set and Map implementations with a rich API and set of utility classes that work with any JDK compatible Collections, Arrays, Maps or Strings. The iteration protocol was inspired by the Smalltalk collection framework. It provides replacements for ArrayList, HashSet, and HashMap optimized for performance and memory usage.

collections java-collection collections-library hashmap set list map

Redisson - Redis based In-Memory Data Grid for Java

•    Java

---

Redisson - Distributed and Scalable Java data structures (Set, SortedSet, Map, ConcurrentMap, List, Queue, Deque, Lock, AtomicLong, CountDownLatch, Publish / Subscribe, HyperLogLog) on top of Redis server. Advanced redis java client. It supports over 28+ data structures and services, Synchronous / asynchronous / reactive interfaces and lot more.

distributed collections locks distributed-locks cache

Apache Commons - Alternative to Java collection

•    Java

---

Commons-Collections seek to build upon the JDK classes by providing new interfaces, implementations and utilities. It provides collection class like Identity map, Ordered map, Reference map, Composite collections, Bag interface etc.

java-collection library map utility

Vavr - Object-functional language extension to Java

•    Java

---

Vavr is an object-functional language extension to Java 8, which aims to reduce the lines of code and increase code quality. It provides persistent collections, functional abstractions for error handling, concurrent programming, pattern matching and much more.

javaslang java8 functional-programming object-functional immutable-collections persistent-collections vavr functional streams collections java-collections

Koloboke - Java Collections till the last breadcrumb of memory and performance

•    Java

---

A family of projects around collections in Java (so far). A carefully designed extension of the Java Collections Framework with primitive specializations and more. Java 6+. Apache 2.0 license.

java-collections koloboke annotation-processor primitive-specializations high-performance hashmap collections