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A better compressed bitset

Roaring bitmaps are compressed bitmaps. They can be hundreds of times faster.

Grab one of our research papers Roaring Bitmaps on GitHub

Widely used

Roaring is found in

Apache Lucene and derivative systems such as Solr and Elasticsearch,
Metamarkets’ Druid,
Apache Spark,
Apache Hive,
Apache Tez,
Netflix Atlas,
LinkedIn Pinot,
OpenSearchServer,
Cloud Torrent,
Whoosh,
Pilosa,
Microsoft Visual Studio Team Services (VSTS),
Jive Miru,
eBay’s Apache Kylin.

Portable

There are freely available software libraries providing Roaring bitmaps in almost all the popular programming languages:

Java,
C, C++,
Go,
C#,
Rust,
Python
…

There is a serialized format specification for interoperability between implementations.