As someone who has done a bit of both Java and CL (and Perl, and C, and Free Pascal, and Guile Scheme, and Raku, and... oh my, where does the time go?) Java is entirely fine. A bit heavy on the ol' RAM, and if you really want to get it fast you need to know which knobs to push and which settings to turn various dials to, but it's fine. I haven't tried that new Graal VM thing, hearsay is that it makes Java run real good, but with plain old OpenJDK it's fine.
