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This is the demo code for a talk on improving cold startup times for JVM-based lambdas usingGraalVM andCustom AWS Lambda Runtimes.

The presentation slides can be found here -https://gitpitch.com/mduesterhoeft/kotlin-graalvm-custom-aws-lambda-runtime-talk#/

Themaster branch contains a runnable sample of an application that exposes the samehandler and exposes it via the standardjava11 runtime and a custom runtime.

To build and deploy the function run the following:

# build the GraalVM native image and package the runime./package.sh # deploy the applicationserverless deploy

Invoke the function running thejava11 runtime

http https://<function-host>/dev/hello/sample

Invoke the function running thecustom runtime

http https://<function-host>/dev/hello-runtime/sample

An extended example that adds DynamoDB to the sample can be found in thedynamodb branch.

Thedynamodb-agent branch builds on the DynamoDB example and shows how to use the GraalVM native image trace agent (akaassisted configuration).