Performance is user experience
Rendering strategy, compression, caching and Core Web Vitals all affect whether a product feels reliable.
flowchart LR A[Rendering strategy] --> B[Network cost] B --> C[Interaction delay] C --> D[User perception] D --> E[Trust]
Working note
Performance is not a technical vanity metric. It changes whether the interface feels calm, whether users trust their action was received and whether the product can support repeated daily use.
Why it matters
SSR, SSG, caching, media compression and Core Web Vitals are user-experience decisions because they shape perceived reliability.