Vibe coders don't understand concepts such as: indexing, caching, deduping, memoization, profiling, Big O, N+1 queries, lazy loading, connection pooling, pagination, re-render management, layout thrashing, virtualization, debouncing, code splitting, memory leaks, garbage collection, streaming vs. buffering, async parallelism, main thread blocking, race conditions, backpressure, request waterfalls, payload optimization, batching, round-trip costs, cache invalidation, hot path analysis, data structure selection, and countless other concepts related to performance."

Caught me with the state pages doing live aggregates per request. Spent yesterday pre-rendering them and tuning the ISR caches. Should feel sharper now.