Run results for: String matching - Regex stripping vs Concatenation of strings

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36

Browser: Chrome 120

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
Regex stripping match	4.1 Ops/sec
Concatenate match with string template	6.8 Ops/sec
Concatenate match with plus	6.8 Ops/sec

HTML Preparation code:

<div></div>

Script Preparation code:

window.stripHtmlSuffix = function(input) {
    return input.replace(/\.html$/, '');
}

window.dataWithHTML = [];
window.dataWithOutHTML = [];
const possibleChars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
const TOTAL_STRINGS = 1000;

function getRandomInt(max) {
    return Math.floor(Math.random() * max);
}

function makeRandomString(len) {
    var text = "";
    for (var i = 0; i < len; i++) {
        text += possibleChars.charAt(getRandomInt(possibleChars.length));
    }
    return text;
}

for(let i=0;i<TOTAL_STRINGS;i++) {
    window.dataWithHTML.push(
      `${makeRandomString(100 + getRandomInt(150))}.html`
    );
    window.dataWithOutHTML.push(
      makeRandomString(100 + getRandomInt(150))
    );
}

Tests:

Regex strip match
let counter = 0; for(let i = 0;i < window.dataWithOutHTML.length; i++) { let dataWithOutHTML = window.dataWithOutHTML[i]; for(let j = 0;j < window.dataWithHTML.length; j++) { let dataWithHTML = window.dataWithHTML[j]; if (dataWithOutHTML === window.stripHtmlSuffix(dataWithHTML)) { counter++; } } }
Concatenate match string template
let counter = 0; for(let i = 0;i < window.dataWithOutHTML.length; i++) { let dataWithOutHTML = window.dataWithOutHTML[i]; for(let j = 0;j < window.dataWithHTML.length; j++) { let dataWithHTML = window.dataWithHTML[j]; if (dataWithHTML === `${dataWithOutHTML}.html`) { counter++; } } }
Concatenate match with plus
let counter = 0; for(let i = 0;i < window.dataWithOutHTML.length; i++) { let dataWithOutHTML = window.dataWithOutHTML[i]; for(let j = 0;j < window.dataWithHTML.length; j++) { let dataWithHTML = window.dataWithHTML[j]; if (dataWithHTML === (dataWithOutHTML + '.html')) { counter++; } } }

Run results for: String matching - Regex stripping vs Concatenation of strings

Regex strip match

Concatenate match string template

Concatenate match with plus