Hello World with GraalVM Native Image : Hakan Dilek

Prerequisites

GraalVM is installed and <GraalVM>/bin directory is in the $PATH
Native Image is installed using the command gu install native-image
Clone the graalvm-playground repository

Run in the VM

For convenience first run the example in the local JVM:

 $ cd graalvm-playground/01hello-world 
 $ ./gradlew clean jar && \
   time java -jar build/libs/01hello-world.jar

 BUILD SUCCESSFUL in 0s
 3 actionable tasks: 3 executed
 Hello World!
 java -jar build/libs/01hello-world.jar  0,08s user 0,03s system 139% cpu 0,083 total
 $

Build Native Image

Make sure that you have the right JVM version (Currently most recent supported version is JDK8-u212):
```
$ javac -version
javac 1.8.0_212
```

Build and run native image

  $ ./gradlew clean jar && \
    native-image -jar build/libs/01hello-world.jar && \
    time ./01hello-world

  BUILD SUCCESSFUL in 0s
  3 actionable tasks: 3 executed
  Build on Server(pid: 4674, port: 34081)
  [01hello-world:4674]    classlist:     172.74 ms
  [01hello-world:4674]        (cap):     955.19 ms
  [01hello-world:4674]        setup:   1,690.68 ms
  [01hello-world:4674]   (typeflow):   2,260.10 ms
  [01hello-world:4674]    (objects):     770.75 ms
  [01hello-world:4674]   (features):     147.15 ms
  [01hello-world:4674]     analysis:   3,250.30 ms
  [01hello-world:4674]     (clinit):      78.32 ms
  [01hello-world:4674]     universe:     262.43 ms
  [01hello-world:4674]      (parse):     313.86 ms
  [01hello-world:4674]     (inline):     913.91 ms
  [01hello-world:4674]    (compile):   2,593.18 ms
  [01hello-world:4674]      compile:   4,097.51 ms
  [01hello-world:4674]        image:     390.85 ms
  [01hello-world:4674]        write:      89.51 ms
  [01hello-world:4674]      [total]:  10,045.79 ms
  Hello World!
  ./01hello-world  0,00s user 0,00s system 87% cpu 0,002 total

Benchmark results

JVM Call (0,083s) vs Native Image (0,002): quiet an improvement!