Well, there are "high-performance things" I like more in Clojure, for example: - areduce / amap - Uncleaned data is often of Object type (due to missing or i

Well, there are "high-performance things" I like more in Clojure, for example: - areduce / amap - Uncleaned data is often of Object type (due to missing or invalid values) upon which one can apply the complete core.reducer functions without intermediate representations. In Java this would be horrible. Still, you're right in the sense that Clojure execution isn't fast than Java's, just its development.