A caching story you scroll through. The chart stays pinned; each step changes one thing — the way a good explainer reveals a system part by part.
↓ scroll to advance
No cache. p99 latency sat at 800ms — the hot path paid full price every time.
Repeat reads now skip the database. p99 falls to ~300ms — but we're not done.
Every deploy emptied the cache, so the first wave of traffic spiked back up.
Prime it before traffic arrives. p99 settles at 190ms — under budget, and stable.