TS transpiles to JS, and then when that JS is executed in Deno, Node.js, a Blink browser like Chrome, etc., it gets just in time compiled to native machine code instead of getting interpreted. Hope that helps.

The JavaScript code is compiled to native and is heavily optimized, as opposed to being interpreted.

I had to deal with large JavaScript codebases targeting IE8 back in the day and probably would’ve slapped anyone back then who suggested using JavaScript for everything. I have to say, though, that faster runtimes like v8 and TypeScript have done wonders, and TypeScript nowadays is actually one of my favorite languages.

I heard a rumor that Amazon did it to dominate the toy market

I certainly would not put it past them.

Show your support for surveillance capitalism and get yourself a face-mounted camera and microphone.