Can we get a "(1999)" date on this, please? Only half joking becuase I see Common Lisp and, sure, I upvote ... but honestly, what's the purpose of this HN submission without context?

SBCL is obviously fantastic but let's contrast with another popular implementation: Embeddable Common Lisp. https://ecl.common-lisp.dev/

Top marks for SBCL performance but ECL can be a better fit for embedding into mobile applications, running on lighter weight hardware, and in the browser.