My web app with dozens of dependencies is ±35MB, using SBCL core compression. So that's heavier than Rust, lighter than Deno, maybe in par with Go when the application grows. It starts up in 0.4s, without compression it does in 0.01s.
When you build SBCL from source, enable the compressed heaps option. Then when you create an app with save-lisp-and-die, you get a fairly small app even without having a treeshaker to remove unused code.
