What's in a sort kernel?

Question

JavaScript

What sorting algorithm/algorithms does JS use when calling the arr.sort( (a, b) => a - b ) method on a numeric array? How to find out what's in the kernel? Is the best option chosen?

Answer 1

It is not specified by the standard, which means that each engine can use its own algorithm. The main thing is to comply with the standard for the challenge and the result.