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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Pulsar Broker
Last Release on Dec 22, 2025
Apache Parquet Avro (Incubating)
Last Release on Apr 25, 2015

Dataset manipulation library built on the top of tech.ml.dataset.
Last Release on Apr 1, 2026
Pinot Core
Last Release on Apr 9, 2026
Flink Runtime
Last Release on Sep 14, 2022
Tephra Transaction System Core Module
Last Release on Apr 25, 2016

Relocated → org.apache.tephra » tephra-core
Apache Solr Content Extraction Library integrates Apache Tika content extraction framework into Solr
Last Release on Sep 25, 2024