Blog — Performance Punch

Performance Punch

Short, practical fixes for slow and tangled web apps — one pattern, one measurable win at a time.

PP #1 · 20 Jul 2026

.find() in a loop is O(n²) wearing a friendly face

Your list of 5,000 items takes 2 seconds to reconcile after every save. No network, no rendering — just JavaScript. The culprit is one innocent-looking line.

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