Exec vs manual finding (v4)

let x = 0;
for (let i = 0; i < s.length; i++)
	if ("#.".includes(s[i]))
		x++;

const regex = /[.#]/g;
let x = 0;
let match = regex.exec(s);
while (match !== null)
{
	x++;
	match = regex.exec(s);
}

let x = 0;

let indexOfId = s.indexOf("#");
let indexOfClass = s.indexOf(".");
let startIndex = indexOfClass === -1 || indexOfId !== -1 && indexOfId < indexOfClass ? indexOfId : indexOfClass;
while (startIndex !== -1)
{
	x++;
	indexOfId = s.indexOf("#", startIndex + 1);
	indexOfClass = s.indexOf(".", startIndex + 1);
	startIndex = indexOfClass === -1 || indexOfId !== -1 && indexOfId < indexOfClass ? indexOfId : indexOfClass;
}

let x = 0;
let index = s.search(/[.#]/);
let tmp = s;
while (index !== -1)
{
	x++;
	tmp = tmp.substring(index + 1);
	index = tmp.search(/[.#]/);
}