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The first thing that comes to mind is its c++ implementation, which sets it far far apart from the java project you mentioned

C++ impl of what? It has like four different things.

Spark? You probably meant Spring, Spark is for Big data and such, usually ephemeral.

There is also a SparkJava web framework

https://sparkjava.com/

Tbh, I don't think it is comparable to this project. A better alternative for Java would be Quarkus or Micronaut, ones that can compile to native using GraalVM.

Thanks!

I really do need to play with GraalVM.

The reason I did this comparison was to try to better understand what is in this project as I may consider using it, not to compare to Java performance wise.