Run results for: CORS Test

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.36

Browser: Chrome 121

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Benchmark engine: Benchmark.js

Test name	Executions per second
✓ Regex: Invalid Cases	2,531,115 Ops/sec
Regex: Valid Cases	1,075,582 Ops/sec
Procedural: Valid Cases	460,507 Ops/sec
Procedural: Invalid Cases	451,345 Ops/sec

Script Preparation code:

// For accuracy declare the regex in root scope
// assume this tester doesnt rerun the setup on each test case
const DOMAIN_TO_LOCALE = Object.freeze({
    com: 'en-us',
    dk: 'da',
    de: 'de',
    fr: 'fr-fr',
    no: 'nb',
    pt: 'pt',
    se: 'sv',
    'com.br': 'pt-br',
    'com.es': 'es',
});
const FOO_VALID_TLDS = Object.keys(DOMAIN_TO_LOCALE).join('|');
const FOO_DOMAIN_REGEX = new RegExp(
    `^https://(?:[\\w-]+\\.)*foo\\.(?:${FOO_VALID_TLDS})\\.?(?::[\\d]{1,5})?$`
);

function checkRegex(url) {
    return FOO_DOMAIN_REGEX.test(url)
}

function checkProcedural(url) {
    const {
        protocol,
        hostname
    } = new URL(url);
    const [subdomain, tld] = hostname.split('foo.');
  
    if (typeof tld === 'undefined') return;

    const isSecure = protocol.startsWith('https');
    const isValidTld = tld in DOMAIN_TO_LOCALE;

    return isSecure && isValidTld;
}

window.validCases = [
    'https://foo.com',
    'https://bar.foo.com',
    'https://foo.bar.foo.com',
    'https://BAR.foo.com',
    'https://-_47.foo.com',
    'https://foo.foo.com',
    'https://foo.com:1',
    'https://foo.com:65535',
    'https://foo.com.',
    'https://foo.com.:47',
    'https://foo.fr',
    'https://develop.foo.fr',
    'https://develop.nested.foo.fr',
    'https://develop.nested.foo.com.es',
];

window.invalidCases = [
    'https://foo.com.fake.com',
    'https://foo.com.org',
    'https://foofoo.com',
    'file://foo.com',
    'http://foo.com',
    'https://.foo.com',
];

Tests:

Regex: Valid Cases
validCases.every(url => checkRegex(url));
Regex: Invalid Cases
invalidCases.every(url => !checkRegex(url));
Procedural: Valid Cases
validCases.every(url => checkProcedural(url));
Procedural: Invalid Cases
invalidCases.every(url => !checkProcedural(url));

Regex: Valid Cases

Regex: Invalid Cases

Procedural: Valid Cases

Procedural: Invalid Cases