Here, have some fun,

"V8 Internals For JavaScript Developers"

https://vimeo.com/312113316

https://v8.dev/blog

Chrome's V8 engine made quite a stir around the turn of the last decade because it it compiled JavaScript down to native code. It would even watch how code was called (if it couldn't statically figure out a safe way to compile it) and generate native code for the happy paths in hot code paths. I simply assume that all browsers do this now because we take it for granted now that JS is reasonably fast, but I could be wrong.

I credit much of Chrome's success to V8. It's a marvel of engineering. Shame that the rest of Chrome hasn't been held to such a high standard.