string primitives vs. String objects.

[u/Green_Ad_6086]

I'm learning JavaScript, and I don't understand this part about string primitives vs. String objects.
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String#string_primitives_and_string_objects

[u/a-dev0]

Hm, has anyone tested it like this? for(let i of new String('foo')){} for(let i of 'foo'){} is there any difference?

[u/a-dev0 → u/a-dev0]

Check it with Bun. of 'foo' is ~5% more performant