How does jruby relate to truffleruby?

brightball · on Sept 17, 2023

He actually talks about that during the video as well. Short answer is “it depends”.

IIRC Truffle is dramatically faster in some benchmarks but slower in others. And there are some usability aspects of the language that are negatively impacted.

sideeffffect · on Sept 18, 2023

I think he shows the performance of running JRuby on top of GraalVM. GraalVM uses Graal (the JIT compiler) in place of C2 (the JIT from HotSpot).

But TruffleRuby is something different. It is another Ruby implementation (just like JRuby is a Ruby implementation) using the Truffle framework. And Truffle framework requires to be run on GraalVM.