Server-Timing

Communicates server-side performance metrics to browser developer tools and Resource Timing.

Use Server-Timing for actionable performance diagnostics and avoid embedding secrets or high-cardinality user identifiers.

httpheaderperformanceobservability

Reference (http)

Server-Timing: db;dur=53, app;dur=47.2

Use Server-Timing for actionable performance diagnostics and avoid embedding secrets or high-cardinality user identifiers.

Common mistakes

Exposing sensitive query details or assuming Server-Timing is visible cross-origin without permission.

IANA registry: http-fields/field-names

Registry reference: Server Timing

Sources