EXPERIMENTAL_FASTCALL

Adds environment variable to avoid speeding tickets, your mileage may vary:

EXPERIMENTAL_FASTCALL=1 node app.js

Enable to dynamically revert to (somewhat broken) behavior prior to v17.1.0.

Do not use unless you can prove that you really have to; most users will not trigger the case where it would make a significant difference. But I'm not your mother and you may do whatever you want to 😉