performance-tuning-pro
Performance tuning (professional)
Skill text is English; answer in the user’s preferred language when rules or the conversation specify it.
Use official MDN Performance APIs, Node.js diagnostics, and web.dev performance for API facts; this skill encodes measure-first optimization, queueing/tail-latency reasoning, and safeguards against benchmark traps — not vendor-specific tuning recipes. Confirm runtime (browser/Node/container), traffic profile, dataset scale, and targets (SLO or informal percentiles).
Boundary
performance-tuning-pro owns diagnosis framing, optimization prioritization, trade-off articulation, and measurement hygiene. postgresql-pro owns SQL and database design. caching-pro owns distributed cache/CDN mechanics. deployment-pro owns release and capacity policy. algorithm-pro owns algorithm selection once profiling proves compute-bound hotspots.