Ruby (CRuby) itself is a scripting language, that is correct. JRuby & TruffleRuby is an implementation of the Ruby language but targets another VM. JRuby targe

Ruby (CRuby) itself is a scripting language, that is correct. JRuby & TruffleRuby is an implementation of the Ruby language but targets another VM. JRuby targets the JVM while TruffleRuby is based on the graalVM. If my memory stands correct, none of these have a compilation step, they both are interpreted. However, TruffleRuby has a feature called Native Image which compiles the language!