Run results for: Check attributes

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/138.0.0.0 Safari/537.36

Browser: Chrome 138

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 9 months ago

Test name	Executions per second
for loop	285876448.0 Ops/sec
string	255186720.0 Ops/sec

HTML Preparation code:

<!--your preparation HTML code goes here-->

Script Preparation code:

const CLOSE_KEYWORDS = ['close', 'exit', 'quit', 'cancel', 'dismiss'];
const attrCount = 1000; // adjust for testing
const matchIndex = 0; // index where matching attribute is placed (0 = early match)

const el = document.createElement('div');

// Generate many attributes
for (let i = 0; i < attrCount; i++) {
  const value = (i === matchIndex) ? 'please close this' : `attr${i}`;
  el.setAttribute(`data-${i}`, value);
}

// Warmup
checkWithEarlyExit(el, CLOSE_KEYWORDS);
checkWithFullJoin(el, CLOSE_KEYWORDS);

Tests:

for loop
function checkWithEarlyExit(el, keywords) { for (const attr of el.attributes) { const val = attr.value.toLowerCase(); if (keywords.some(keyword => val.includes(keyword))) { return true; } } return false; }
string
function checkWithFullJoin(el, keywords) { const allAttrValues = Array.from(el.attributes, attr => attr.value.toLowerCase()).join(' '); return keywords.some(keyword => allAttrValues.includes(keyword)); }

Run results for: Check attributes

for loop

string