JavaEWAH
com.googlecode.javaewah.JavaEWAH
1.2.3

Built: 2024-05-06 at 08:52
Reported: 2024-05-06 at 09:19

https://download.eclipse.org/staging/2024-06


This installable unit index report is produced by https://ci.eclipse.org/simrel/job/simrel.oomph.repository-analyzer.test/.

Description

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.

PGP Keys

Signed 0x65af8ad45d95ddfc7efba7b5ba23161e259d09cc egit-dev@eclipse.org

Artifacts

166.5K plugins/com.googlecode.javaewah.JavaEWAH_1.2.3.jar

Content Metadata

<unit id="com.googlecode.javaewah.JavaEWAH" version="1.2.3" singleton="false"> <update id="com.googlecode.javaewah.JavaEWAH" range="[0.0.0,1.2.3)" severity="0"/> <properties size="7"> <property name="org.eclipse.equinox.p2.name" value="JavaEWAH"/> <property name="org.eclipse.equinox.p2.description" value="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."/> <property name="maven-groupId" value="com.googlecode.javaewah"/> <property name="maven-artifactId" value="JavaEWAH"/> <property name="maven-version" value="1.2.3"/> <property name="maven-repository" value="eclipse.maven.central.mirror"/> <property name="maven-type" value="jar"/> </properties> <provides size="7"> <provided namespace="org.eclipse.equinox.p2.iu" name="com.googlecode.javaewah.JavaEWAH" version="1.2.3"/> <provided namespace="osgi.bundle" name="com.googlecode.javaewah.JavaEWAH" version="1.2.3"/> <provided namespace="java.package" name="com.googlecode.javaewah" version="1.2.3 "/> <provided namespace="java.package" name="com.googlecode.javaewah.datastructure" version="1.2.3 "/> <provided namespace="java.package" name="com.googlecode.javaewah.symmetric" version="1.2.3"/> <provided namespace="osgi.identity" name="com.googlecode.javaewah.JavaEWAH" version="1.2.3"> <properties size="1"> <property name="type" value="osgi.bundle"/> </properties> </provided> <provided namespace="org.eclipse.equinox.p2.eclipse.type" name="bundle" version="1.0.0 "/> </provides> <requires size="3"> <required namespace="java.package" name="com.googlecode.javaewah" range="0.0.0 "/> <required namespace="java.package" name="com.googlecode.javaewah.datastructure" range="0.0.0 "/> <required namespace="org.eclipse.equinox.p2.iu" name="com.googlecode.javaewah.JavaEWAH.source" range="[1.2.3,1.2.3] " optional="true"> <filter> (org.eclipse.update.install.sources=true) </filter> </required> </requires> <artifacts size="1"> <artifact classifier="osgi.bundle" id="com.googlecode.javaewah.JavaEWAH" version="1.2.3"/> </artifacts> <touchpoint id="org.eclipse.equinox.p2.osgi" version="1.0.0"/> <touchpointData size="1"> <instructions size="1"> <instruction key="manifest"> Bundle-SymbolicName: com.googlecode.javaewah.JavaEWAH Bundle-Version: 1.2.3 </instruction> </instructions> </touchpointData> </unit>