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 provides also big (64-bit) arrays, sets and lists, sorting algorithms, fast, practical I/O classes for binary and text files, and facilities for memory mapping large files. Note that if you have both this jar and fastutil-core.jar in your dependencies, fastutil-core.jar should be excluded.

Artifacts using Fastutil (1,256)
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Apache Apex Malhar Library
Last Release on Nov 4, 2017
Pulsar Client Java Original
Last Release on Apr 14, 2026
HyperLogLog: approximate distinct value counting algoritm
Last Release on Jul 30, 2014
Druid Extensions API
Last Release on Dec 12, 2018

Relocated → org.apache.druid » druid-core
Apache Solr (module: analysis-extras)
Last Release on Mar 4, 2026
Dtype Next
Last Release on May 6, 2026
GumTree core module.
Last Release on Oct 19, 2021
Asynchronous HTTP/2 RPC/REST client/server library built on top of Java 8, Netty, Thrift and gRPC (armeria-shaded)
Last Release on Nov 6, 2018

Relocated → com.linecorp.armeria » armeria
DKPro Core ASL IO CoNLL
Last Release on Aug 4, 2024
Library to build Android applications.
Last Release on May 5, 2026