[snotrockets]

I'm not sure if this is the case; due to the immense body of work on JIT JavaScript, ClojureScript would usually perform better than Clojure for everything but math, hence would be good idea for server side usage as well. YMMV, of course.

[black-tea]

The jvm has also had an immense amount of work done on its jit. One oft cited problem is its boot time, but other than that, its clojurescript really faster?

[pjmlp]

Which is a Clojure problem, Java doesn't suffer from it.

https://blog.ndk.io/jvm-slow-startup.html

[vnorilo]

Do you have a source? I'm skeptical but interested.

[snotrockets]

Internal tests, heard the same from others. I didn't do much digging, but I think it's the JVM being very under optimized for code not written in Java.