Why Every Backend Needs Multi-Tier Caching (L1 RAM + L2 Redis)

<p>Redis is the undisputed king of distributed caching. But if your application backend is querying Redis over the network on <em>every single incoming request</em>, you are leaving massive performance on the table.</p> <p>Even inside the same cloud availability zone (AWS VPC or Google Cloud), a roundtrip network hop to Redis costs <strong>1.0 to 4.5 milliseconds</strong>.</p> <p>Under 20,000 requ

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