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Koloboke - Java Collections till the last breadcrumb of memory and performance
Koloboke aims to replace the standard Java collections and streams with more efficient implementations. The current version of Koloboke focuses on replacing java.util.HashSet and java.util.HashMap. It provides a complete set of primitive type implementations for each collection. Its able to avoid the expensive boxing/unboxing of primitives and saves memory for boxed primitive objects. It is the fastest and the most memory efficient library implementing hash maps and sets.
collections java-collection collections-library hashmap set list mapGuava - Google Core Libraries for Java
Guava is a set of core libraries that includes new collection types (such as multimap and multiset), immutable collections, a graph library, functional types, an in-memory cache, and APIs/utilities for concurrency, I/O, hashing, primitives, reflection, string processing, and much more.
java-collection concurrency hash murmur-hash collections reflection cache libraryJCTools - Java Concurrency Tools for the JVM
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-structureColt - Scientific and Technical Computing in Java
Colt distribution consists of several free Java libraries bundled under one single uniform umbrella. Namely the Colt library, the Jet library, the CoreJava library, and the Concurrent library. It provides support for resizable arrays, dense, sparse matrices, histogramming functionality, Random Number Generators etc.
math math-library java-collection library map utility scientific technical-computingFastutil - Fast & compact type-specific collections for Java
Fastutil extends the Java Collections Framework by providing type-specific maps, sets, lists and queues with a small memory footprint and fast access and insertion. It also provides also big (64-bit) arrays, sets and lists, and fast, practical I/O classes for binary and text files.
java-collection library map utilityhigh-scale-lib
A collection of Concurrent and Highly Scalable Utilities. These are intended as direct replacements for the java.util.* or java.util.concurrent.* collections but with better performance when many CPUs are using the collection concurrently.
java-collection library concurrentEclipse Collections - Best Java Collection Framework
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-structureAgrona - Library to build high-performance applications in Java and C++
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-structuregs-collections - A supplement or replacement for the Java Collections Framework
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 mapHazelcast - In-Memory Data Grid for Java
Hazelcast is a clustering and highly scalable data distribution platform for Java. It supports Distributed implementations of java.util.{Queue, Set, List, Map}, java.util.concurrency.locks.Lock, java.util.concurrent.ExecutorService, Distributed Indexing and Query support, Dynamic scaling, partitioning with backups, fail-over, Web-based cluster monitoring tool and lot more.
cache cluster datagrid distributed-cache in-memory java-collection map java-utilityHPPC - High Performance Primitive Collections for Java
HPPC provides template-generated implementations of typical collections, such as lists, sets and maps, for all Java primitive types. The primary driving force behind HPPC is optimization for highest performance and memory efficiency.
collections java-collection collections-library hashmap set list mapMango - specialized iterators and functions
Mango is a Java library consisting of a number of iterators, algorithms and functions, loosely inspired by the C++ Standard Template Library. It has support of 12 iterators, 16 generic algorithms and variety of function types.
java-collection library map utility functors predicateTrove - High performance collections for Java
Trove provides fast, lightweight implementations of the java.util Collections API. These implementations are designed to be pluggable replacements for their JDK equivalents. This gap in the JDK is often addressed by using the "wrapper" classes (java.lang.Integer, java.lang.Float, etc.) with Object-based collections. For most applications, however, collections which store primitives directly will require less space and yield significant performance gains.
java-collection library map utilityApache Commons - Alternative to Java collection
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 utilityCactoos - Object-Oriented Java primitives, as an alternative to Google Guava and Apache Commons
Cactoos is a collection of object-oriented Java primitives as an alternative to Google Guava and Apache Commons.
oop java-library oop-principles oop-library collections java-collection data-structure primitiveSocial Icons
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