Caching a regular expression from a function?

Question

JavaScript

Can v8, well, or other engines in the node optimize a function call with a regular expression? In general, which of the options is preferable.
one.

function isValidPropNumber(propNumber) {
  return /^[1-9][0-9]{0,14}$/.test(propNumber);
};

2. Well, further in a larger function, it is used at some of the stages of verification
const REGEX = /^[1-9][0-9]{0,14}$/;

heavyFunction() {
//... много кода
if (isValidPropNumber(something) || REGEX.test(something)) { };
//... еще много кода
}

Answer 1

The second one is preferable. I think that for v8 it is thousandths of a second to create this object again. And it will not be cached, because the object was created in the context of the function and after the function is executed, the reference to it will be lost, because the scope of the function is deleted after its execution.