Minimizar el acceso DOM - JavaScript

// This is slow, it accesses the DOM element multiple times
document.querySelector('#my-element').classList.add('my-class');
document.querySelector('#my-element').textContent = 'hello';
document.querySelector('#my-element').hidden = false;

// This is faster, it stores the DOM element in a variable
const myElement = document.querySelector('#my-element');
myElement.classList.add('my-class');
myElement.textContent = 'hello';
myElement.hidden = false;
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