LISP comes in many variants! Both compiled and interpreted. LISP is a rare and shiny specimen because it, it it’s more complex forms, uses an Ahead of Time compiler.
To the best of my knowledge, LISP’s compiler and runtime environment is the fastest and most power efficient of all the non-C compiled langauges.
I wrote a little about this in my LISP operating system manifesto on my Gemini capsule—it is my view that ‘speed’ and ‘power efficiency’ only make sense in the context of human goal-oriented tasks. Mere speed of program execution is not actually an argument for not using LISP or having a language which is interpreted.
But yes, you are right! Compared to assembly or C, LISP is a little bit slower. That said, however, the speed at which you can build solutions to problems in LISP is faster, so I maintain ^^