Collections
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High performance collections for Java
Last Release on Aug 3, 2018
The Trove library provides high speed regular and primitive collections for Java.
Last Release on Dec 4, 2014

Relocated → net.sf.trove4j » core
High performance collections for Java
Last Release on Nov 8, 2005

Relocated → net.sf.trove4j » trove4j
Parallel Colt is a multithreaded version of Colt - a library for high performance scientific computing in Java. It contains efficient algorithms for data analysis, linear algebra, multi-dimensional arrays, Fourier transforms, statistics and ...
Last Release on Jul 29, 2013
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 includes a fast I/O API for binary and text files.
Last Release on Apr 20, 2007

Relocated → it.unimi.dsi » fastutil
Collections library of the Staccato-Commons project, focused on providing new abstractions that mix object oriented and functional programming style for dealing with iterable objects.
Last Release on Jan 2, 2012
High performance bit set implementations.
Last Release on Mar 27, 2015
Collections library of the Staccatissimo project, focused on providing new abstractions that mix object oriented and functional programming style for dealing with iterable objects.
Last Release on Jul 21, 2012
Imperative utility classes for handling java collections
Last Release on Mar 19, 2016
An immutable Map based on identity
Last Release on Apr 1, 2015