Answer
- Minimize DOM manipulation in async tasks
- Use throttling and debouncing
- Prefer async/await over nested promises
- Use Web Workers for heavy computations
- Clean up timers and event listeners
Quick Answer
High-performance async JS: use Promise.all() for parallel independent operations (not sequential await), avoid creating Promises in tight loops, use AbortController to cancel stale requests, batch DOM updates after async completion, avoid awaiting in loops (Promise.all([...items.map(item => process(item))]) runs in parallel), and cache repeated async results with memoization.
S
SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
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Source: SugharaIQ