コアウェブパフォーマンス
Diagnose loading and the critical rendering path
Trace discovery, priority, transfer, parse, style, layout and paint before applying performance folklore.
Combine lab and field performance testing
Use controlled diagnosis and real-user distributions together across devices, networks and journeys.
Enforce performance budgets with observability and rollback
Turn user-centred limits into release gates, production alerts and a reliable recovery route.