Advanced SSR Caching with React
summary
High-traffic site with ~3–4 million monthly visitors and 350 req/s shows server rendering costs ~200 ms initial response so caching is essential: caching API data drops end-to-end to ~50 ms, while caching rendered HTML reduces latency further. Practical options are per-component caching (route-level rules via react-router), profiling with Electrode-style tools, and a synchronous remote cache that supports cluster-wide caches and streaming; a rollout to real users is already underway.
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