all-dressed-programming/stream-examples
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didier committed 2024-09-10 12:51:49 -04:00
1 parent 61700e7b59
commit 1fab7b30c1
11 files changed
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.envrc
+1
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use flake
.gitignore
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target
result
.direnv
.idea/compiler.xml
Generated
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<?xml version="1.0" encoding="UTF-8"?>
<project version="4">
<component name="CompilerConfiguration">
<annotationProcessing>
<profile name="Maven default annotation processors profile" enabled="true">
<sourceOutputDir name="target/generated-sources/annotations" />
<sourceTestOutputDir name="target/generated-test-sources/test-annotations" />
<outputRelativeToContentRoot value="true" />
<module name="stream-examples" />
</profile>
</annotationProcessing>
</component>
</project>
.idea/jarRepositories.xml
Generated
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@@ -0,0 +1,20 @@
<?xml version="1.0" encoding="UTF-8"?>
<project version="4">
<component name="RemoteRepositoriesConfiguration">
<remote-repository>
<option name="id" value="central" />
<option name="name" value="Central Repository" />
<option name="url" value="https://repo.maven.apache.org/maven2" />
</remote-repository>
<remote-repository>
<option name="id" value="central" />
<option name="name" value="Maven Central repository" />
<option name="url" value="https://repo1.maven.org/maven2" />
</remote-repository>
<remote-repository>
<option name="id" value="jboss.community" />
<option name="name" value="JBoss Community repository" />
<option name="url" value="https://repository.jboss.org/nexus/content/repositories/public/" />
</remote-repository>
</component>
</project>
.idea/vcs.xml
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<?xml version="1.0" encoding="UTF-8"?>
<project version="4">
<component name="VcsDirectoryMappings">
<mapping directory="" vcs="Git" />
</component>
</project>
README.md
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```
# VM version: JDK 22.0.2, OpenJDK 64-Bit Server VM, 22.0.2+9-jvmci-b01
# VM invoker: /nix/store/lschm1if5f45qf8zwr5z7h0afhd00gd4-graalvm-ce-22.0.2/bin/java
# VM options: -XX:ThreadPriorityPolicy=1 -XX:+UnlockExperimentalVMOptions -XX:+EnableJVMCIProduct -XX:-UnlockExperimentalVMOptions -javaagent:/nix/store/0y08ljcqmrqrcmjcx7zvx9k3haifhx0q-idea-ultimate-2024.2.0.2/idea-ultimate/lib/idea_rt.jar=40733:/nix/store/0y08ljcqmrqrcmjcx7zvx9k3haifhx0q-idea-ultimate-2024.2.0.2/idea-ultimate/bin -Dfile.encoding=UTF-8 -Dsun.stdout.encoding=UTF-8 -Dsun.stderr.encoding=UTF-8
# Blackhole mode: compiler (auto-detected, use -Djmh.blackhole.autoDetect=false to disable)
Benchmark Mode Cnt Score Error Units
Main.brokenDownWithMethods thrpt 25 6815.783 ± 106.436 ops/s
Main.brokenDownWithMethodsWithStreams thrpt 25 6178.742 ± 85.668 ops/s
Main.classical thrpt 25 5780.151 ± 19.606 ops/s
```
flake.lock
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{
"nodes": {
"nixpkgs": {
"locked": {
"lastModified": 1725634671,
"narHash": "sha256-v3rIhsJBOMLR8e/RNWxr828tB+WywYIoajrZKFM+0Gg=",
"owner": "nixos",
"repo": "nixpkgs",
"rev": "574d1eac1c200690e27b8eb4e24887f8df7ac27c",
"type": "github"
},
"original": {
"owner": "nixos",
"ref": "nixos-unstable",
"repo": "nixpkgs",
"type": "github"
}
},
"root": {
"inputs": {
"nixpkgs": "nixpkgs",
"utils": "utils"
}
},
"systems": {
"locked": {
"lastModified": 1681028828,
"narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
"owner": "nix-systems",
"repo": "default",
"rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
"type": "github"
},
"original": {
"owner": "nix-systems",
"repo": "default",
"type": "github"
}
},
"utils": {
"inputs": {
"systems": "systems"
},
"locked": {
"lastModified": 1710146030,
"narHash": "sha256-SZ5L6eA7HJ/nmkzGG7/ISclqe6oZdOZTNoesiInkXPQ=",
"owner": "numtide",
"repo": "flake-utils",
"rev": "b1d9ab70662946ef0850d488da1c9019f3a9752a",
"type": "github"
},
"original": {
"owner": "numtide",
"repo": "flake-utils",
"type": "github"
}
}
},
"root": "root",
"version": 7
}
flake.nix
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{
inputs = {
nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
utils.url = "github:numtide/flake-utils";
};
outputs = { self, nixpkgs, utils }: utils.lib.eachDefaultSystem (system:
let
pkgs = nixpkgs.legacyPackages.${system};
pname = "stream-examples";
benchmark = pkgs.maven.buildMavenPackage {
mvnJdk = pkgs.jdk22;
pname = pname;
version = "0.1.0";
src = ./.;
nativeBuildInputs = [ pkgs.makeWrapper ];
mvnHash = "sha256-G7PQd0Ul61m+C9S7OvAB6NkMxRM8AMYg5+1G0RQeXP8=";
installPhase = ''
ls -lrth
mkdir -p $out/bin $out/share/${pname}
install -Dm644 target/stream-examples.jar $out/share/${pname}/${pname}.jar
echo 'didier rocks!'
mkdir -p $out/bin $out/share/${pname}
makeWrapper ${pkgs.jdk22}/bin/java $out/bin/${pname} \
--add-flags "-jar $out/share/${pname}/${pname}.jar"
'';
};
in
{
packages = {
benchmark = benchmark;
};
devShell = pkgs.mkShell {
buildInputs = with pkgs; [
jdk22
maven
];
};
}
);
}
pom.xml
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@@ -4,9 +4,9 @@
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion> <modelVersion>4.0.0</modelVersion>
<groupId>org.example</groupId> <groupId>org.all-dressed-programming</groupId>
<artifactId>stream-examples</artifactId> <artifactId>stream-examples</artifactId>
<version>1.0-SNAPSHOT</version> <version>0.1.0-SNAPSHOT</version>
<properties> <properties>
<maven.compiler.source>22</maven.compiler.source> <maven.compiler.source>22</maven.compiler.source>
@@ -27,4 +27,38 @@
</dependency> </dependency>
</dependencies> </dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-help-plugin</artifactId>
<version>3.5.0</version>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>3.6.0</version>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<finalName>${project.artifactId}</finalName>
<transformers>
<transformer
implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
<manifestEntries>
<Main-Class>com.alldressedprogramming.Main</Main-Class>
<Build-Number>1</Build-Number>
</manifestEntries>
</transformer>
</transformers>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project> </project>
src/main/java/com/alldressedprogramming/Main.java
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@@ -1,5 +1,6 @@
package com.alldressedprogramming; package com.alldressedprogramming;
import java.util.concurrent.TimeUnit;
import org.openjdk.jmh.annotations.*; import org.openjdk.jmh.annotations.*;
import org.openjdk.jmh.infra.Blackhole; import org.openjdk.jmh.infra.Blackhole;
@@ -11,7 +12,12 @@ import java.util.stream.LongStream;
import java.util.stream.Stream; import java.util.stream.Stream;
@State(Scope.Benchmark) @State(Scope.Thread)
@Fork( 1 )
@Warmup( iterations = 2 )
@Measurement( iterations = 10 )
@BenchmarkMode( Mode.AverageTime )
@OutputTimeUnit( TimeUnit.MICROSECONDS )
public class Main { public class Main {
public record Song(List<String> composers) { public record Song(List<String> composers) {
@@ -30,7 +36,6 @@ public class Main {
} }
public static Album createFakeAlbum(Random random) { public static Album createFakeAlbum(Random random) {
var seed = random.nextLong();
var songs = IntStream.range(2, 25) var songs = IntStream.range(2, 25)
.mapToObj(Random::new) .mapToObj(Random::new)
.map(Main::createFakeSong) .map(Main::createFakeSong)
@@ -43,16 +48,9 @@ public class Main {
.mapToObj(Random::new) .mapToObj(Random::new)
.map(Main::createFakeAlbum) .map(Main::createFakeAlbum)
.toList(); .toList();
}
List<Album> albums;
@Setup(Level.Invocation)
public void setUp() {
albums = createFakeAlbums(1000);
} }
final List<Album> albums = createFakeAlbums(10_000);
@Benchmark @Benchmark
public void classical(Blackhole blackhole) { public void classical(Blackhole blackhole) {
@@ -92,6 +90,15 @@ public class Main {
return ret; return ret;
} }
@Benchmark
public void brokenDownWithMethodsWith10Duplicates(Blackhole blackhole) {
for(int i = 0; i < 10; i++){
List<Album> recentAlbums = getRecentAlbums(albums);
List<Song> newTaylorSwift = getTaylorSwiftSongs(recentAlbums);
blackhole.consume(newTaylorSwift);
}
}
@Benchmark @Benchmark
public void brokenDownWithMethods(Blackhole blackhole) { public void brokenDownWithMethods(Blackhole blackhole) {
List<Album> recentAlbums = getRecentAlbums(albums); List<Album> recentAlbums = getRecentAlbums(albums);
@@ -113,10 +120,17 @@ public class Main {
public void brokenDownWithMethodsWithStreams(Blackhole blackhole) { public void brokenDownWithMethodsWithStreams(Blackhole blackhole) {
Stream<Album> recentAlbums = getRecentAlbumsAsStream(albums.stream()); Stream<Album> recentAlbums = getRecentAlbumsAsStream(albums.stream());
Stream<Song> newTaylorSwift = getTaylorSwiftSongsAsStream(recentAlbums); Stream<Song> newTaylorSwift = getTaylorSwiftSongsAsStream(recentAlbums);
blackhole.consume(newTaylorSwift); blackhole.consume(newTaylorSwift.toList());
} }
public static void main(String[] args) throws Exception { public static void main(String[] args) throws Exception {
org.openjdk.jmh.Main.main(args); org.openjdk.jmh.Main.main(args);
// var main = new Main();
// var albums = Main.createFakeAlbums(100);
// List<Album> recentAlbums = main.getRecentAlbums(albums);
// List<Song> newTaylorSwift = main.getTaylorSwiftSongs(recentAlbums);
// System.out.println(newTaylorSwift.size());
} }
} }
src/main/java/com/alldressedprogramming/StreamBenchmarks.java
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package com.alldressedprogramming;
import org.openjdk.jmh.annotations.Benchmark;
import org.openjdk.jmh.annotations.BenchmarkMode;
import org.openjdk.jmh.annotations.Fork;
import org.openjdk.jmh.annotations.Measurement;
import org.openjdk.jmh.annotations.Mode;
import org.openjdk.jmh.annotations.OutputTimeUnit;
import org.openjdk.jmh.annotations.Warmup;
import org.openjdk.jmh.infra.Blackhole;
import java.util.ArrayList;
import java.util.concurrent.TimeUnit;
import java.util.stream.Stream;
@Fork( 1 )
@Warmup( iterations = 2 )
@Measurement( iterations = 10 )
@BenchmarkMode( Mode.AverageTime )
@OutputTimeUnit( TimeUnit.MILLISECONDS )
public class StreamBenchmarks
{
private static final int LIMIT = 10_000;
enum Foo
{
ONE( 1 ), TWO( 2 ), THREE( 3 ), FOUR( 4 ), FIVE( 5 ), SIX( 6 ), SEVEN( 7 ), EIGHT( 8 );
private final int value;
Foo( int value )
{
this.value = value;
}
public int getValue()
{
return value;
}
}
@Benchmark
public void iterationWithForLoop( Blackhole blackhole )
{
for ( int i = 0; i < LIMIT; i++ )
{
var ret = new ArrayList<Integer>();
for ( var foo : Foo.values() )
{
if ( foo.getValue() % 2 == 0 )
{
ret.add( foo.getValue() );
}
}
blackhole.consume( ret );
}
}
@Benchmark
public void iterationWithStream( Blackhole blackhole )
{
for ( int i = 0; i < LIMIT; i++ )
{
var ret = Stream.of( Foo.values() )
.map( Foo::getValue )
.filter( x -> x % 2 == 0 )
.toList();
blackhole.consume( ret );
}
}
@Benchmark
public void findFirstWithForLoop( Blackhole blackhole )
{
for ( int i = 0; i < LIMIT; i++ )
{
int ret = -1;
for ( var foo : Foo.values() )
{
if ( foo.getValue() == 6 )
{
break;
}
}
blackhole.consume( ret );
}
}
@Benchmark
public void findFirstWithStream( Blackhole blackhole )
{
for ( int i = 0; i < LIMIT; i++ )
{
var ret = Stream.of( Foo.values() )
.map( Foo::getValue )
.filter( x -> x == 6 )
.findFirst()
.orElse( -1 );
blackhole.consume( ret );
}
}
public static void main( String[] args )
throws Exception
{
org.openjdk.jmh.Main.main( args );
}
}