Balancing Dynamic Rendering and Caching

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The chapter explores the challenges of caching user-specific data and dynamic content variations at the CDN level, focusing on a bug related to caching only at the index page level. It discusses strategies for optimizing website performance through caching, including using URL parameters for internationalization and avoiding caching specific parts of the webpage. The speaker also delves into the concept of custom cache management functions and the utility of using Redis for efficient data caching.

Scott and Wes dive into the cache problem, tackling user-specific data and caching security. From marketing A/B testing to content negotiation, they explore various challenges and solutions, including different URL/query parameters, edge logic, and client-side caching.

Show Notes

00:00 Welcome to Syntax!
01:22 Syntax is on YouTube.
02:16 Let’s talk about the cache problem.
03:33 User-specific data and caching security.
06:27 Why might this pop up?
- 06:29 Marketing A/B testing - cookie based.
- 06:55 User-selected features - such as themes.
- 06:58 Language or geo-based items - accept language.
- 07:11 Images - WebP for some browsers, jpg for others.
- 07:45 JSON/HTML based on accept header.
- 08:17 Different encoding.
08:26 Content negotiation.
08:54 The solutions.
- 09:04 Provide different URLs/Query parameter.
- 11:19 Don’t cache the page, cache the data based on query.
- 15:01 Implement a “Cache Key” - one render for every option.
- Netlify
- Fastly
- Cloudflare
- 18:17 Use edge logic.
- 19:52 Just do it client-side.