Engineer's First HTML Page Caching Design Reveals Broader System-Wide Lessons

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A software engineer recently designed HTML page caching for a web platform using AWS CloudFront as the CDN, marking their first hands-on experience with the task. The project surfaced an unexpected connection between rendering strategies and caching: SSR-generated HTML, including embedded data, can be served directly from CloudFront's cache, while CSR-fetched API data falls outside that cache layer. This led the engineer to recognize that CSR and SSR are not just rendering choices but also influence which data benefits from CDN-level caching. The work also prompted broader thinking about caching across the entire system, including API responses at the CDN or backend level, areas initially outside the project's scope. Ultimately, starting from the narrow goal of caching HTML pages expanded the engineer's understanding of TTL decisions and where cache policies should be applied across different architectural layers.

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ProgrammingDEV Community ·

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