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BAEL-5912 Introduction to RoaringBitmap (#13326)

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alemoles 2023-02-21 13:20:33 -03:00 committed by GitHub
parent 27b3b339a8
commit 9089d84d2b
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7
core-java-modules/core-java-collections-5/README.md Normal file
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=========
## Core Java Collections Cookbooks and Examples
### Relevant Articles:
- More articles: [[<-- prev]](/core-java-modules/core-java-collections-4)

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core-java-modules/core-java-collections-5/pom.xml Normal file
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<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<artifactId>core-java-collections-5</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>core-java-collections-5</name>
<packaging>jar</packaging>
<parent>
<groupId>com.baeldung.core-java-modules</groupId>
<artifactId>core-java-modules</artifactId>
<version>0.0.1-SNAPSHOT</version>
</parent>
<dependencies>
<dependency>
<groupId>org.junit.platform</groupId>
<artifactId>junit-platform-runner</artifactId>
<version>${junit-platform.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.junit.jupiter</groupId>
<artifactId>junit-jupiter</artifactId>
<version>${junit.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
<version>${junit.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.roaringbitmap</groupId>
<artifactId>RoaringBitmap</artifactId>
<version>${roaringbitmap.version}</version>
</dependency>
<dependency>
<groupId>org.openjdk.jmh</groupId>
<artifactId>jmh-generator-annprocess</artifactId>
<version>${jmh.version}</version>
</dependency>
<dependency>
<groupId>org.openjdk.jmh</groupId>
<artifactId>jmh-core</artifactId>
<version>${jmh.version}</version>
</dependency>
</dependencies>
<properties>
<junit.version>5.9.2</junit.version>
<roaringbitmap.version>0.9.38</roaringbitmap.version>
<jmh.version>1.36</jmh.version>
</properties>
</project>

82
core-java-modules/core-java-collections-5/src/main/java/com/baeldung/roaringbitmap/BitSetsBenchmark.java Normal file
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package com.baeldung.roaringbitmap;
import java.util.BitSet;
import org.openjdk.jmh.annotations.Benchmark;
import org.openjdk.jmh.annotations.Scope;
import org.openjdk.jmh.annotations.Setup;
import org.openjdk.jmh.annotations.State;
import org.roaringbitmap.RoaringBitmap;
@State(Scope.Thread)
public class BitSetsBenchmark {
private RoaringBitmap rb1;
private BitSet bs1;
private RoaringBitmap rb2;
private BitSet bs2;
private final static int SIZE = 10_000_000;
@Setup
public void setup() {
rb1 = new RoaringBitmap();
bs1 = new BitSet(SIZE);
rb2 = new RoaringBitmap();
bs2 = new BitSet(SIZE);
for (int i = 0; i < SIZE / 2; i++) {
rb1.add(i);
bs1.set(i);
}
for (int i = SIZE / 2; i < SIZE; i++) {
rb2.add(i);
bs2.set(i);
}
}
@Benchmark
public RoaringBitmap roaringBitmapUnion() {
return RoaringBitmap.or(rb1, rb2);
}
@Benchmark
public BitSet bitSetUnion() {
BitSet result = (BitSet) bs1.clone();
result.or(bs2);
return result;
}
@Benchmark
public RoaringBitmap roaringBitmapIntersection() {
return RoaringBitmap.and(rb1, rb2);
}
@Benchmark
public BitSet bitSetIntersection() {
BitSet result = (BitSet) bs1.clone();
result.and(bs2);
return result;
}
@Benchmark
public RoaringBitmap roaringBitmapDifference() {
return RoaringBitmap.andNot(rb1, rb2);
}
@Benchmark
public BitSet bitSetDifference() {
BitSet result = (BitSet) bs1.clone();
result.andNot(bs2);
return result;
}
@Benchmark
public RoaringBitmap roaringBitmapXOR() {
return RoaringBitmap.xor(rb1, rb2);
}
@Benchmark
public BitSet bitSetXOR() {
BitSet result = (BitSet) bs1.clone();
result.xor(bs2);
return result;
}
}

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core-java-modules/core-java-collections-5/src/main/java/com/baeldung/roaringbitmap/BitSetsBenchmarkRunner.java Normal file
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package com.baeldung.roaringbitmap;
import java.io.IOException;
public class BitSetsBenchmarkRunner {
public static void main(String... args) throws IOException {
org.openjdk.jmh.Main.main(args);
}
}

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core-java-modules/core-java-collections-5/src/test/java/com/baeldung/roaringbitmap/RoaringBitmapBenchmarkUnitTest.java Normal file
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package com.baeldung.roaringbitmap;
import static org.junit.jupiter.api.Assertions.assertEquals;
import org.junit.jupiter.api.Test;
import org.roaringbitmap.RoaringBitmap;
class RoaringBitmapBenchmarkUnitTest {
@Test
public void givenTwoRoaringBitmap_whenUsingOr_thenWillGetSetsUnion() {
RoaringBitmap expected = RoaringBitmap.bitmapOf(1, 2, 3, 4, 5, 6, 7, 8);
RoaringBitmap A = RoaringBitmap.bitmapOf(1, 2, 3, 4, 5);
RoaringBitmap B = RoaringBitmap.bitmapOf(4, 5, 6, 7, 8);
RoaringBitmap union = RoaringBitmap.or(A, B);
assertEquals(expected, union);
}
@Test
public void givenTwoRoaringBitmap_whenUsingAnd_thenWillGetSetsIntersection() {
RoaringBitmap expected = RoaringBitmap.bitmapOf(4, 5);
RoaringBitmap A = RoaringBitmap.bitmapOfRange(1, 6);
RoaringBitmap B = RoaringBitmap.bitmapOf(4, 5, 6, 7, 8);
RoaringBitmap intersection = RoaringBitmap.and(A, B);
assertEquals(expected, intersection);
}
@Test
public void givenTwoRoaringBitmap_whenUsingAndNot_thenWillGetSetsDifference() {
RoaringBitmap expected = RoaringBitmap.bitmapOf(1, 2, 3);
RoaringBitmap A = new RoaringBitmap();
A.add(1L, 6L);
RoaringBitmap B = RoaringBitmap.bitmapOf(4, 5, 6, 7, 8);
RoaringBitmap difference = RoaringBitmap.andNot(A, B);
assertEquals(expected, difference);
}
@Test
public void givenTwoRoaringBitmap_whenUsingXOR_thenWillGetSetsSymmetricDifference() {
RoaringBitmap expected = RoaringBitmap.bitmapOf(1, 2, 3, 6, 7, 8);
RoaringBitmap A = RoaringBitmap.bitmapOfRange(1, 6);
RoaringBitmap B = RoaringBitmap.bitmapOfRange(4, 9);
RoaringBitmap xor = RoaringBitmap.xor(A, B);
assertEquals(expected, xor);
}
}

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core-java-modules/pom.xml
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<module>core-java-collections-2</module>
<module>core-java-collections-3</module>
<module>core-java-collections-4</module>
<module>core-java-collections-5</module>
<module>core-java-collections-conversions</module>
<module>core-java-collections-conversions-2</module>
<module>core-java-collections-set-2</module>