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avoid expensive operations

sveltejs/svelte
Based on 5 comments
JavaScript

Identify and eliminate computationally expensive operations through early termination, better data structures, and algorithmic optimizations. Look for opportunities to short-circuit loops, cache results, and choose more efficient algorithms.

Algorithms JavaScript

Reviewer Prompt

Identify and eliminate computationally expensive operations through early termination, better data structures, and algorithmic optimizations. Look for opportunities to short-circuit loops, cache results, and choose more efficient algorithms.

Key strategies:

  • Early termination: Stop processing when the desired condition is already met
  • Efficient data structures: Use Sets instead of arrays for membership testing to reduce O(n²) to O(n)
  • Minimize traversals: Avoid expensive tree walking or DOM traversal operations when possible
  • Optimize bit operations: Use combined bit checks for better performance

Example of early termination:

// Before: continues checking even after condition is met
for (const item of items) {
  if (checkCondition(item)) {
    hasCondition = true;
  }
  // continues processing...
}

// After: stops as soon as condition is found
for (const item of items) {
  if (checkCondition(item)) {
    hasCondition = true;
    break; // early termination
  }
}

Example of better data structure choice:

// Before: O(n²) complexity with array includes
const needsVersionIncrease = !s.reactions?.every(r => version.reactions?.includes(r));

// After: O(n) complexity with Set
const vReactions = version.reactions === null ? null : new Set(version.reactions);
const needsVersionIncrease = vReactions === null || !s.reactions?.every(r => vReactions.has(r));
5
Comments Analyzed
JavaScript
Primary Language
Algorithms
Category

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