JavaEWAH

The bit array data structure is implemented in Java as the BitSet class. Unfortunately, this fails to scale without compression. JavaEWAH is a word-aligned compressed variant of the Java bitset class. It uses a 64-bit run-length encoding (RLE) compression scheme. The goal of word-aligned compression is not to achieve the best compression, but rather to improve query processing time. Hence, we try to save CPU cycles, maybe at the expense of storage. However, the EWAH scheme we implemented is always more efficient storage-wise than an uncompressed bitmap (implemented in Java as the BitSet class). Unlike some alternatives, javaewah does not rely on a patented scheme.

License	Apache 2
GroupId	com.googlecode.javaewah
ArtifactId	JavaEWAH
Last Version	1.1.13
Release Date	Sep 29, 2021
Type	jar
Description	JavaEWAH The bit array data structure is implemented in Java as the BitSet class. Unfortunately, this fails to scale without compression. JavaEWAH is a word-aligned compressed variant of the Java bitset class. It uses a 64-bit run-length encoding (RLE) compression scheme. The goal of word-aligned compression is not to achieve the best compression, but rather to improve query processing time. Hence, we try to save CPU cycles, maybe at the expense of storage. However, the EWAH scheme we implemented is always more efficient storage-wise than an uncompressed bitmap (implemented in Java as the BitSet class). Unlike some alternatives, javaewah does not rely on a patented scheme.
Project URL	https://github.com/lemire/javaewah

Download JavaEWAH

Filename	Size
JavaEWAH-1.1.13.pom
JavaEWAH-1.1.13.jar	16 KB
JavaEWAH-1.1.13-sources.jar	10 KB
JavaEWAH-1.1.13-javadoc.jar	47 KB

How to add to project

Apache Maven

<!-- https://jarcasting.com/artifacts/com.googlecode.javaewah/JavaEWAH/ -->
<dependency>
    <groupId>com.googlecode.javaewah</groupId>
    <artifactId>JavaEWAH</artifactId>
    <version>1.1.13</version>
</dependency>

Gradle Groovy

// https://jarcasting.com/artifacts/com.googlecode.javaewah/JavaEWAH/
implementation 'com.googlecode.javaewah:JavaEWAH:1.1.13'

Gradle Kotlin

// https://jarcasting.com/artifacts/com.googlecode.javaewah/JavaEWAH/
implementation ("com.googlecode.javaewah:JavaEWAH:1.1.13")

Apache Buildr

'com.googlecode.javaewah:JavaEWAH:jar:1.1.13'

Apache Ivy

<dependency org="com.googlecode.javaewah" name="JavaEWAH" rev="1.1.13">
  <artifact name="JavaEWAH" type="jar" />
</dependency>

Groovy Grape

@Grapes(
@Grab(group='com.googlecode.javaewah', module='JavaEWAH', version='1.1.13')
)

Scala SBT

libraryDependencies += "com.googlecode.javaewah" % "JavaEWAH" % "1.1.13"

Leiningen

[com.googlecode.javaewah/JavaEWAH "1.1.13"]

Dependencies

test (1)

Group / Artifact	Type	Version
junit : junit	jar	4.13.1

Project Modules

There are no modules declared in this project.

Versions

Version
1.1.13 Sep 29, 2021
1.1.12 May 20, 2021
1.1.11 May 18, 2021
1.1.9 May 10, 2021
1.1.8 May 7, 2021
1.1.7 Nov 9, 2019
1.1.6 Apr 27, 2016
1.1.5 Jan 9, 2016
1.1.4 Dec 18, 2015
1.1.3 Dec 4, 2015
1.1.2 Nov 11, 2015
1.1.1 Nov 8, 2015
1.1.0 Oct 28, 2015
1.0.8 Oct 14, 2015
1.0.7 Aug 15, 2015
1.0.6 Aug 15, 2015
1.0.5 Aug 14, 2015
1.0.4 Aug 13, 2015
1.0.3 Aug 12, 2015
1.0.2 Apr 10, 2015
1.0.1 Mar 23, 2015
1.0.0 Jan 6, 2015
0.9.2 Dec 4, 2014
0.9.1 Dec 3, 2014
0.9.0 Sep 8, 2014
0.8.12 Aug 25, 2014
0.8.11 Aug 15, 2014
0.8.10 Aug 14, 2014
0.8.9 Aug 11, 2014
0.8.7 Jul 18, 2014
0.8.6 Apr 29, 2014
0.8.5 Mar 24, 2014
0.8.4 Mar 17, 2014
0.8.3 Feb 20, 2014
0.8.2 Jan 26, 2014
0.8.1 Jan 7, 2014
0.8.0 Jan 3, 2014
0.7.9 Nov 12, 2013
0.7.8 Oct 2, 2013
0.7.7 Oct 1, 2013
0.7.6 Oct 1, 2013
0.7.5 Sep 8, 2013
0.7.4 Sep 7, 2013
0.7.3 Aug 8, 2013
0.7.2 Jul 25, 2013
0.7.1 Jul 20, 2013
0.7.0 Jul 16, 2013
0.6.12 May 21, 2013
0.6.11 Mar 29, 2013
0.6.10 Mar 14, 2013
0.6.9 Mar 8, 2013
0.6.8 Feb 22, 2013
0.6.7 Feb 15, 2013
0.6.6 Dec 12, 2012
0.6.5 Nov 26, 2012
0.6.4 Nov 16, 2012
0.6.3 Nov 1, 2012
0.6.2 Oct 19, 2012
0.6.1 Oct 19, 2012
0.6.0 Oct 15, 2012
0.5.6 Oct 6, 2012
0.5.5 Oct 5, 2012
0.5.4 Oct 5, 2012
0.5.3 Aug 8, 2012
0.5.2 Jul 9, 2012
0.5.1 May 28, 2012
0.5.0 May 23, 2012
0.4.5 May 22, 2012
0.4.4 May 22, 2012
0.4.3 Apr 9, 2012
0.4.2 Apr 5, 2012
0.4.1 Mar 20, 2012
0.4.0 Mar 6, 2012
0.3.3 Mar 2, 2012
0.3.2 Jan 16, 2012
0.3.1 Jan 3, 2012