🔧 useMemo, useCallback, React.memo — What Optimizations Actually Work

The Myth That's Costing You Performance


Here's a confession: I used to wrap nearly every callback in useCallback and every computed value in useMemo. I thought I was being a "performance-conscious" developer. Turns out, I was making my apps slower.

After profiling dozens of production React applications—from Slack-like chat platforms to complex...