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$ curl repovive.com/roadmaps/javascript/the-dom/performance-considerations

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$ curl repovive.com/roadmaps/javascript/the-dom/performance-considerations

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Performance Considerations - The DOM | JavaScript | Repovive

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JavaScript22 sections · 783 units18h total

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Performance Considerations

Write efficient DOM code

DOM operations are slow compared to JavaScript. Optimize by:

Minimizing DOM queries (cache references)
Batching updates with fragments
Using textContent over innerHTML
Avoiding layout thrashing (read, then write)

// Bad: query each time
for (...) document.querySelector(".x").style...

// Good: cache reference
const el = document.querySelector(".x");
for (...) el.style...