[ryansolid]

More than likely it's the lazy loading of the REPL. Those code editors are heavy and when they scroll into view they need to load. If we load up front it would drastically tank the load performance for people just visiting the site. It's possible on mobile we should opt for a click to load strategy.

There is very little we can do about this once we do go to load, it's just the nature a heavy fully featured editor like Monaco.

[eyelidlessness]

I wonder if you could share a single Monaco instance across multiple editors with some kind of twoslash chicanery behind the scenes. The TypeScript Playground recently got support for “multiple files” via twoslash comments; it’s kind of buggy but may work with some finesse.