GraalVM与Spring Native初体验

安装GraalVM

下载地址: https://github.com/graalvm/graalvm-ce-builds/releases/tag/vm-21.3.0. 根据我的主机环境, 选择 java11 MacOS (amd64) 下载.

解压

tar -zxf graalvm-ce-java11-darwin-amd64-21.3.0.tar.gz

配置环境变量

vi ~/.bash_profile

加入(替换原JAVA_HOME配置)

export PATH=/Users/cuishiying/app/graalvm-ce-java11-21.3.0/Contents/Home/bin:$PATH
export JAVA_HOME=/Users/cuishiying/app/graalvm-ce-java11-21.3.0/Contents/Home

应用并生效

source ~/.bash_profile

查看是否生效

➜  bin echo $JAVA_HOME
/Users/cuishiying/app/graalvm-ce-java11-21.3.0/Contents/Home

➜  bin java -version
openjdk version "11.0.13" 2021-10-19
OpenJDK Runtime Environment GraalVM CE 21.3.0 (build 11.0.13+7-jvmci-21.3-b05)
OpenJDK 64-Bit Server VM GraalVM CE 21.3.0 (build 11.0.13+7-jvmci-21.3-b05, mixed mode, sharing)

Hello World

新建1个java文件

touch HelloWorld.java

然后写入

public class HelloWorld {
  public static void main(String[] args) {
    System.out.println("Hello, World!");
  }
}

JVM版

➜  desktop javac HelloWorld.java
➜  desktop time java HelloWorld
Hello, World!
java HelloWorld  0.10s user 0.03s system 129% cpu 0.104 total

GraalVM版

先进行安装 native-image

gu install native-image

查看已安装

➜  desktop gu list
ComponentId              Version             Component name                Stability                     Origin
---------------------------------------------------------------------------------------------------------------------------------
graalvm                  21.3.0              GraalVM Core                  Supported
js                       21.3.0              Graal.js                      Supported
native-image             21.3.0              Native Image                  Early adopter                 github.com

➜  desktop native-image --version
GraalVM 21.3.0 Java 11 CE (Java Version 11.0.13+7-jvmci-21.3-b05)

然后在刚刚编译HelloWorld的目录下进行执行

➜  desktop native-image HelloWorld
[helloworld:38788]    classlist:   1,606.07 ms,  0.96 GB
[helloworld:38788]        (cap):   3,521.96 ms,  0.96 GB
[helloworld:38788]        setup:   5,748.94 ms,  0.96 GB
[helloworld:38788]     (clinit):     207.66 ms,  1.72 GB
[helloworld:38788]   (typeflow):   4,566.81 ms,  1.72 GB
[helloworld:38788]    (objects):   3,792.94 ms,  1.72 GB
[helloworld:38788]   (features):   1,429.65 ms,  1.72 GB
[helloworld:38788]     analysis:  10,383.54 ms,  1.72 GB
[helloworld:38788]     universe:   1,208.89 ms,  1.72 GB
[helloworld:38788]      (parse):   1,254.93 ms,  1.76 GB
[helloworld:38788]     (inline):   1,320.43 ms,  1.76 GB
[helloworld:38788]    (compile):  15,208.22 ms,  2.38 GB
[helloworld:38788]      compile:  18,858.23 ms,  2.38 GB
[helloworld:38788]        image:   1,381.92 ms,  2.38 GB
[helloworld:38788]        write:     524.57 ms,  2.38 GB
[helloworld:38788]      [total]:  40,024.02 ms,  2.38 GB
# Printing build artifacts to: /Users/cuishiying/work/desktop/helloworld.build_artifacts.txt

等待一段时间后，我们会发现文件生成了

➜  desktop ll
total 21224
-rw-r--r--  1 cuishiying  staff   427B  6  3 11:59 HelloWorld.class
-rw-r--r--  1 cuishiying  staff   117B  6  3 11:37 HelloWorld.java
-rwxr-xr-x  1 cuishiying  staff    10M  6  3 12:03 helloworld
-rw-r--r--  1 cuishiying  staff    25B  6  3 12:03 helloworld.build_artifacts.txt

完全没问题，再测试一下时间

➜  desktop time ./helloworld
Hello, World!
./helloworld  0.01s user 0.01s system 1% cpu 0.762 total