Caching in C#: A Comprehensive Technical Guide
In.NET systems, performance is often won or lost on the read path. Every extra database or API call adds latency and cost. Caching fixes that by keeping frequently used data, like product lists or lookups, close to your code, turning slow trips into instant reads. This is not theoretical, it works in the real world. Stack Overflow runs a two-tier cache (in-process + Redis), where a Redis hop takes only 0.2–0.5 ms and local memory reads are effectively instant.
