---
title: "Discussion on \"React | React.memo, useMemo, useCallback – what’s the difference?\" | Hashnode"
description: "Discussion on \"React | React.memo, useMemo, useCallback – what’s the difference?\". I always mix these up, so I finally sat down to write a quick comparison. They’re all about React performance optimisation, but they solve slightly different problems.\n1. React.memo – don’t rerender this if props are the same\ntsx\nconst Child = React...."
url: "https://hashnode.com/posts/react-reactmemo-usememo-usecallback-whats-the-difference/687e5e711afa58cdc103bdbe"
---

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Discussion

# [React | React.memo, useMemo, useCallback – what’s the difference?](https://val-codeops.hashnode.dev/react-reactmemo-usememo-usecallback-whats-the-difference?utm_source=hashnode&utm_medium=feed)

I always mix these up, so I finally sat down to write a quick comparison. They’re all about React performance optimisation, but they solve slightly different problems. 1. React.memo – don’t rerender this if props are the same tsx const Child = React....

Jul 21, 2025 · 2 min read · val-codeops.hashnode.dev  
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## Written by

[Valencia Miyeon Jang](https://hashnode.com/@valencia23)

@valencia23 · Cambridge, United Kingdom

  
[View profile](https://hashnode.com/@valencia23)

Frontend dev, sharing my journey

Front-end developer with a background in Korean language QA and education. Experienced in localisation testing, cross-functional teamwork, and user-focused development. I enjoy crafting intuitive web experiences with React, Next.js, and TypeScript — always learning, always building.

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