Benchmark: Regex vs For loop [1-9]|X 2

Script Preparation code:

var dataPool = ["1234", "1X34", "0123", "12x4"];
var testStr = dataPool[Math.floor(Math.random() * dataPool.length)];

Tests:

Regex
let isValid = true; let regStr = `(${i+1}|X)`; const regEx = new RegExp(regStr); for (let i = 0; i < testStr.length; i++) { let code = testStr.charAt(i); if(regEx.test(code) === false){ isValid = false; break; } } return isValid;
For loop, ParseInt
let isValid = true; for (let i = 0; i < testStr.length; i++) { let code = testStr.charAt(i); if (code === "X"){ } else{ let codeValue = parseInt(code, 10); if(codeValue !== i+1){ isValid = false; break; } } } return isValid;
For loop with switch case
let isValid = true; for (let i = 0; i < testStr.length; i++) { let char = testStr.charAt(i); switch (true) { case char === 'X': break; case parseInt(char, 10) === i + 1: break; default: isValid = false; } } return isValid;
For loop, toString
let isValid = true; for (let i = 0; i < testStr.length; i++) { let code = testStr.charAt(i); if (code === "X"){ } else{ if(code !== (i+1).toString()){ isValid = false; break; } } } return isValid;

Rendered benchmark preparation results:

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Regex vs For loop [1-9]|X 2 (version: 0)