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CDNsun and other CDNs sit between your users and your origin to reduce latency, increase throughput, and protect infrastructure from traffic spikes. But the real gains (or disappointments) come down to how a single request is routed, negotiated over TLS, evaluated for caching, and fetched from origin on a miss. This article walks through that end-to-end request path and the decisions that most affect performance and cache hit ratio.
From URL to edge: DNS routing, connection reuse, and the TLS [...]