概要
以下、自分用のメモです。
Oracle の GraalVM が以下の記事を出していました。
PublicKeyさんの方でも記事なってますね。
本番環境でもオッケイという状態になってます。素晴らしい。
せっかくなので、ちょっと試してみましてみて、その内容を以下のリポジトリにアップしておきました。
よかったら、ご参考まで。Gitpod上で試せるようにしています。
試してみる
以下は上記リポジトリの内容です。
インストール
$ wget https://download.oracle.com/graalvm/20/latest/graalvm-jdk-20_linux-x64_bin.tar.gz $ tar zxf graalvm-jdk-*.tar.gz $ mv graalvm-jdk-*/ graalvm $ graalvm/bin/gu install native-image
ソースコード
こういうときは、まずはへろーワールドからです。
public class App { public static void main(String[] args) { System.out.println("hello world"); } }
タスクファイル
を使ってます。
# https://taskfile.dev version: "3" vars: DIR_GRAALVM: "{{.PWD}}/graalvm/bin" CMD_GU: "{{.DIR_GRAALVM}}/gu" CMD_JAVAC: "{{.DIR_GRAALVM}}/javac" CMD_NATIVEIMAGE: "{{.DIR_GRAALVM}}/native-image" tasks: install-nativeimage: internal: true cmds: - "{{.CMD_GU}} install native-image" helloworld: deps: [install-nativeimage] dir: helloworld cmds: - rm -f ./app ./App.class - "{{.CMD_JAVAC}} App.java" - "{{.CMD_NATIVEIMAGE}} -Ob App" - file ./app - ./app
実行してみる
$ task helloworld task: [install-nativeimage] /workspace/java-graalvm-native-image-example/graalvm/bin/gu install native-image Picked up JAVA_TOOL_OPTIONS: -Xmx3489m Downloading: Artifacts catalog from gds.oracle.com Skipping ULN EE channels, no username provided. Downloading: Component catalog from www.graalvm.org Processing Component: Native Image Component Native Image (org.graalvm.native-image) is already installed. task: [helloworld] rm -f ./app ./App.class task: [helloworld] /workspace/java-graalvm-native-image-example/graalvm/bin/javac App.java Picked up JAVA_TOOL_OPTIONS: -Xmx3489m task: [helloworld] /workspace/java-graalvm-native-image-example/graalvm/bin/native-image -Ob App ======================================================================================================================== GraalVM Native Image: Generating 'app' (executable)... ======================================================================================================================== [1/8] Initializing... (7.4s @ 0.16GB) Java version: 20.0.1+9, vendor version: Oracle GraalVM 20.0.1+9.1 Graal compiler: optimization level: b, target machine: x86-64-v3, PGO: off C compiler: gcc (linux, x86_64, 11.3.0) Garbage collector: Serial GC (max heap size: 80% of RAM) [2/8] Performing analysis... [*****] (13.0s @ 0.29GB) 2,042 (62.05%) of 3,291 types reachable 2,021 (46.71%) of 4,327 fields reachable 9,660 (39.63%) of 24,374 methods reachable 655 types, 106 fields, and 419 methods registered for reflection 49 types, 32 fields, and 48 methods registered for JNI access 4 native libraries: dl, pthread, rt, z [3/8] Building universe... (2.1s @ 0.27GB) [4/8] Parsing methods... [**] (2.1s @ 0.38GB) [5/8] Inlining methods... [***] (1.3s @ 0.28GB) [6/8] Compiling methods... [***] (7.8s @ 0.30GB) [7/8] Layouting methods... [*] (1.0s @ 0.26GB) [8/8] Creating image... [*] (1.6s @ 0.33GB) 2.28MB (37.79%) for code area: 5,415 compilation units 3.41MB (56.50%) for image heap: 56,678 objects and 1 resources 352.72kB ( 5.71%) for other data 6.04MB in total ------------------------------------------------------------------------------------------------------------------------ Top 10 origins of code area: Top 10 object types in image heap: 1.20MB java.base 484.79kB byte[] for code metadata 892.84kB svm.jar (Native Image) 471.33kB byte[] for java.lang.String 86.61kB com.oracle.svm.svm_enterprise 377.09kB java.lang.String 18.42kB org.graalvm.nativeimage.base 325.55kB java.lang.Class 17.37kB jdk.internal.vm.ci 263.68kB byte[] for general heap data 14.99kB jdk.proxy1 163.75kB java.util.HashMap$Node 14.88kB org.graalvm.sdk 112.63kB char[] 13.15kB jdk.proxy3 94.62kB byte[] for reflection metadata 4.97kB jdk.internal.vm.compiler 87.89kB java.lang.Object[] 3.62kB jdk.proxy2 79.77kB com.oracle.svm.core.hub.DynamicHubCompanion 54.00B for 1 more packages 538.33kB for 565 more object types ------------------------------------------------------------------------------------------------------------------------ Recommendations: G1GC: Use the G1 GC ('--gc=G1') for improved latency and throughput. PGO: Use Profile-Guided Optimizations ('--pgo') for improved throughput. HEAP: Set max heap for improved and more predictable memory usage. CPU: Enable more CPU features with '-march=native' for improved performance. BRPT: Try out the new build reports with '-H:+BuildReport'. ------------------------------------------------------------------------------------------------------------------------ 1.5s (3.9% of total time) in 33 GCs | Peak RSS: 1.07GB | CPU load: 3.61 ------------------------------------------------------------------------------------------------------------------------ Produced artifacts: /workspace/java-graalvm-native-image-example/helloworld/app (executable) ======================================================================================================================== Finished generating 'app' in 37.0s. task: [helloworld] file ./app ./app: ELF 64-bit LSB pie executable, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, BuildID[sha1]=702622388ce481b5798334d9c14c9d0f60b3b418, for GNU/Linux 3.2.0, with debug_info, not stripped task: [helloworld] ./app hello world
結構コンパイルに時間がかかりますね。
ちゃんと実行ファイルが出来てるのが確認できます。
参考情報
過去の記事については、以下のページからご参照下さい。
サンプルコードは、以下の場所で公開しています。
