Next.js 15 Caching & Rendering Tutorial for Beginners
Learn Next.js 15 caching and rendering with the App Router. Perfect for developers seeking a clear, in-depth understanding.

freeCodeCamp.org
39.4K views • Aug 13, 2025

About this video
Learn Next.js 15 Caching & Rendering using the App Router. This tutorial is designed for developers who want a clear, engineering-level understanding of how Next.js optimizes performance through smart rendering strategies and layered caching.
🔗 Code example: https://github.com/logicbaselabs/nextjs-caching-rendering
🔗 Next.js Caching Documentation: https://nextjs.org/docs/app/guides/caching
To connect with Sumit Saha, check out his social accounts:
- YouTube: https://www.youtube.com/@logicBaseLabs
- LinkedIn: https://www.linkedin.com/in/sumitanalyzen
- X: https://x.com/sumit_analyzen
- Facebook: https://facebook.com/sumit_analyzen
❤️ Support for this channel comes from our friends at Scrimba – the coding platform that's reinvented interactive learning: https://scrimba.com/freecodecamp
⭐️ Contents ⭐️
⌨️ (0:00:00) Intro
⌨️ (0:02:19) What is Caching
⌨️ (0:03:15) Rendering Strategies - SSG SSR ISR CSR
⌨️ (0:08:31) React Client & Server Components - Hydration
⌨️ (0:13:32) RSC Payload
⌨️ (0:16:22) How Rendering works in Next.js
⌨️ (0:17:11) Why Caching Strategies
⌨️ (0:19:34) Discover Caching Strategies
⌨️ (0:26:42) 3W & 3H Framework
⌨️ (0:29:14) Request Memoization Example
⌨️ (0:42:52) Request Memoization Summary with Animation
⌨️ (0:45:12) Request Memoization - 3W & 3H Question Answers
⌨️ (0:47:13) Request Memoization - Points to Remember
⌨️ (0:48:41) Data Cache Example
⌨️ (0:58:02) Data Cache Summary with Animation
⌨️ (1:02:41) Data Cache - 3W & 3H Question Answers
⌨️ (1:05:51) Data Cache - Points to Remember
⌨️ (1:08:34) Full Route Cache Example
⌨️ (1:16:09) Full Route Cache Summary with Animation
⌨️ (1:18:07) Full Route Cache - 3W & 3H Question Answers
⌨️ (1:21:21) Full Route Cache - Points to Remember
⌨️ (1:21:38) Router Cache Example
⌨️ (1:31:53) Router Cache Summary with Diagram
⌨️ (1:33:06) Router Cache - 3W & 3H Question Answers
⌨️ (1:35:57) Go through the Documentation
⌨️ (1:37:32) unstable_cache & use cache
⌨️ (1:40:21) Wrap Up
🎉 Thanks to our Champion and Sponsor supporters:
👾 Drake Milly
👾 Ulises Moralez
👾 Goddard Tan
👾 David MG
👾 Matthew Springman
👾 Claudio
👾 Oscar R.
👾 jedi-or-sith
👾 Nattira Maneerat
👾 Justin Hual
--
Learn to code for free and get a developer job: https://www.freecodecamp.org
Read hundreds of articles on programming: https://freecodecamp.org/news
🔗 Code example: https://github.com/logicbaselabs/nextjs-caching-rendering
🔗 Next.js Caching Documentation: https://nextjs.org/docs/app/guides/caching
To connect with Sumit Saha, check out his social accounts:
- YouTube: https://www.youtube.com/@logicBaseLabs
- LinkedIn: https://www.linkedin.com/in/sumitanalyzen
- X: https://x.com/sumit_analyzen
- Facebook: https://facebook.com/sumit_analyzen
❤️ Support for this channel comes from our friends at Scrimba – the coding platform that's reinvented interactive learning: https://scrimba.com/freecodecamp
⭐️ Contents ⭐️
⌨️ (0:00:00) Intro
⌨️ (0:02:19) What is Caching
⌨️ (0:03:15) Rendering Strategies - SSG SSR ISR CSR
⌨️ (0:08:31) React Client & Server Components - Hydration
⌨️ (0:13:32) RSC Payload
⌨️ (0:16:22) How Rendering works in Next.js
⌨️ (0:17:11) Why Caching Strategies
⌨️ (0:19:34) Discover Caching Strategies
⌨️ (0:26:42) 3W & 3H Framework
⌨️ (0:29:14) Request Memoization Example
⌨️ (0:42:52) Request Memoization Summary with Animation
⌨️ (0:45:12) Request Memoization - 3W & 3H Question Answers
⌨️ (0:47:13) Request Memoization - Points to Remember
⌨️ (0:48:41) Data Cache Example
⌨️ (0:58:02) Data Cache Summary with Animation
⌨️ (1:02:41) Data Cache - 3W & 3H Question Answers
⌨️ (1:05:51) Data Cache - Points to Remember
⌨️ (1:08:34) Full Route Cache Example
⌨️ (1:16:09) Full Route Cache Summary with Animation
⌨️ (1:18:07) Full Route Cache - 3W & 3H Question Answers
⌨️ (1:21:21) Full Route Cache - Points to Remember
⌨️ (1:21:38) Router Cache Example
⌨️ (1:31:53) Router Cache Summary with Diagram
⌨️ (1:33:06) Router Cache - 3W & 3H Question Answers
⌨️ (1:35:57) Go through the Documentation
⌨️ (1:37:32) unstable_cache & use cache
⌨️ (1:40:21) Wrap Up
🎉 Thanks to our Champion and Sponsor supporters:
👾 Drake Milly
👾 Ulises Moralez
👾 Goddard Tan
👾 David MG
👾 Matthew Springman
👾 Claudio
👾 Oscar R.
👾 jedi-or-sith
👾 Nattira Maneerat
👾 Justin Hual
--
Learn to code for free and get a developer job: https://www.freecodecamp.org
Read hundreds of articles on programming: https://freecodecamp.org/news
Video Information
Views
39.4K
Likes
2.0K
Duration
01:40:57
Published
Aug 13, 2025
User Reviews
4.7
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