With SBCL and Linux kernels with binfmt_misc support enabled (module or compiled) you can execute FASL file from command line, using the same SBCL core for all

With SBCL and Linux kernels with binfmt_misc support enabled (module or compiled) you can execute FASL file from command line, using the same SBCL core for all the executables and, I would add, with an "instantaneous" feel. ^__^ With Debian it should work out of the box, on other distributions it probably needs to register a wrapper/trampoline with the binfmt_misc infrastructure. FWIK running instances don't share the same core in RAM though. $ cat hello-world.lisp /tmp (print "Hello. World!") $ sbcl --noinform /tmp * (compile-file "hello-world.lisp" :output-file "hello-world") ; compiling file "/tmp/hello-world.lisp" (written 23 AUG 2017 11:09:24 AM): ; compiling (PRINT "Hello. World!") ; /tmp/hello-world.fasl written ; compilation finished in 0:00:00.001 #P"/tmp/hello-world.fasl" NIL NIL * % $ chmod +x ./hello-world.fasl /tmp $ ls -lh hello-world.fasl /tmp -rwxr-xr-x 1 user user 330 Aug 23 11:17 hello-world.fasl* $ time ./hello-world.fasl /tmp "Hello. World!" ./hello-world.fasl 0.00s user 0.00s system 44% cpu 0.009 total $ /tmp Edit for clarifications and fixing formatting