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performanceVercel

Minimize Re-renders

MUST

MUST: Track and minimize re-renders (React DevTools/React Scan)

Minimize and make re-renders fast

Bad

Good

Why it matters

Excessive re-renders slow down the UI, especially in controlled inputs. Use React.memo, useMemo, and useCallback judiciously. Profile with React DevTools to identify components that re-render unnecessarily.

References

Built by Gleb Stroganov, design engineer at Evil Martians.

The rules come from other people's skills and guidelines — Vercel, Rauno Freiberg, @Ibelick, impeccable, Emil Kowalski, Tailwind, RAMS — each one credited on the Sources page. The work here is extraction and wiring: every rule is pulled into one corpus, given a good and a bad example you can operate, a MUST/SHOULD/NEVER rule an agent can paste, and a link back to where it came from.