I wanted to test ktor.io with graalvm build, main problem is all code I found using gradle and my project is using mvn here is the code. like other modules I needed to create reflect config json, otherwise ktor serialize is not working properly with graal and when I send a request to “/hello” endpoint I got empty response. I tried to write myself but did not work and at the end I used command below

java -agentlib:native-image-agent=config-output-dir=./graalcnf/ -jar target/ktor-demo-1.0.1-SNAPSHOT-jar-with-dependencies.jar

when I ran this command in ktor-demo folder it created graalcnf folder and wrote every required files there. After that we need to give those to graal native build with the config below

Args = --enable-http \
-H:IncludeResources=.*\\.properties \
  -H:ConfigurationFileDirectories=${project.basedir}/graalcnf/ 

Check here to see full configuration. Ktor response with graal vm is 35 and quarkus is 23. can see full respot here.