Performance.EntrySourcePerformance entry objects.
The type for PerformanceEntry objects.
start_time e is the start time of e.
to_json e is a JSON representation of e.
Always check the type' before coercing an entry type to its subtype. Objects of type PerformanceMark, PerformanceMeasure, PerformanceFrameTiming, and PerformancePaintTiming do not provide additional properties, so no modules are provided for them.
Resource timing entries.
Navigation timing entries.
as_resource_timing e is e as a ressource timing entry.
as_navigation_timing e is e as a navigation timing entry.