This is fast enough, it could be used to write command line utilities in Javascript! What about a Javascript OS in the style of the Lisp machines or early Smalltalks?

Record-query [1] embeds v8 for its query language, which seems to add a significant amount of heft. I know that couchdb uses js for querying as well. It seems like this could be another option for something like that.

[1] https://github.com/dflemstr/rq

Convert the QuickJS code into Rust using c2rust[1], then reuse in rq.

[1] https://github.com/immunant/c2rust