Dev.to
7/8/2026

The user wants me to rewrite a headline about JavaScript's for...of loop being better than reduce().
Original: When a `for...of` Loop Is Better Than `reduce()`
Short summary
The article argues that JavaScript's reduce() is often overused for tasks where a simple for...of loop would be clearer, easier to debug, and faster. While reduce excels at genuine reductions like summing values or applying state reducers, forcing it into grouping, filtering, or transformation patterns adds unnecessary cognitive load and performance overhead. The best engineers prioritize readability and maintainability over functional purity or cleverness.
- •for...of loops are often clearer and faster than reduce() for grouping, filtering, and transformation tasks
- •reduce() is ideal for genuine reductions like summing or state-machine patterns, not as a universal tool
- •Optimize for cognitive load and maintainability, not code brevity or functional purity
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