performance-optimization
Optimizes application performance across frontend, backend, queries, and databases. Use when performance requirements exist, when you suspect performance regressions, when Core Web Vitals or load time
What it does
Optimizes application performance across frontend, backend, queries, and databases. Use when performance requirements exist, when you suspect performance regressions, when Core Web Vitals or load times need improvement, when N+1 query patterns need fixing, or when profiling reveals bottlenecks.
Quality judgment
Exceptionally disciplined skill built around a measure-identify-fix-verify-guard workflow with concrete thresholds, decision tables, and anti-rationalization guidance. Code examples are sparse and some fixes are deferred to referenced files, but the reasoning quality and structure are top-tier.