Looking for Kotliners who are interested in contributing to

Question

Looking for Kotliners who are interested in contributing to the OpenFaaS Kotlin Templates project The project provides Kotlin templates for the open source OpenFaas Serverless platform which is supported by the community Need some people who can work on a new OpenFaaS Kotlin JVM template which will use Graal as the preferred JVM implementation

gildor · Answer

Are you talking about Graal for AOT or just as alternative VM

kenkyee · Answer

What contributions do you need

napperley · Answer

Graal is used as alternative VM

napperley · Answer

After contributions to a new Kotlin JVM template that will work in a manner similar to the Kotlin Native template using a lightweight library framework toolkit which is suitable for Serverless

gildor · Answer

What is a point to use Graal as VM in your case

napperley · Answer

Shorter startup time smaller code size and lower memory usage

gildor · Answer

Do you have any good benchmarks about this

napperley · Answer

There is this Graal benchmark covers Netty which is relevant for Serverless <https medium com graalvm instant netty startup using graalvm native image generation ed6f14ff7692> Main catch with the benchmarks is that they only cover the native image side instead of the VM side

gildor · Answer

Exactly

gildor · Answer

There are obvious advantages and restrictions and disadvantages of compilation to native binary But if we talk about alternative VM I m not sure that it s so obvious yeah looks like Graal JVM probably can give some improvements for some specific use cases but this is not so visible and also can be slower than newest JVMs graal vm implementation is for Java 8 and of course has much less adoption so not sure that this is really worth to do and adopt Graal VM for some generic project at least now

napperley · Answer

In that case it might be worth looking into OpenJ9 <https www eclipse org openj9 >

gildor · Answer

I don t think that openj9 is somehow significant better for generic use case Looks more like marketing about cost effectively in the cloud

gildor · Answer

sure maybe for some highload use cases it make sense but I m not really believe probably you can get more just from tuning JVM for your use case but for functions I think it s nothing comparing on startup penalty

kenkyee · Answer

Ditto I don t think Graal as a VM is worth it Startup time is similar to other VMs Graal AOT on the other hand is worth it for serverless

gildor · Answer

< kenkyee> +100

gildor · Answer

Actually for FaaS graal aot looks like an obvious choice You just need some webserver that works with aot without too much configuration

napperley · Answer

Very likely to be a huge issue since many Java Kotlin libraries frameworks toolkits use Netty as a basic web server Vert x wouldn t be a possible option when you look at the sheer amount of changes that need to be made for Graal AOT <https vertx io blog eclipse vert x goes native >