ReadonlydetailThe read-only detail property returns arbitrary metadata that was included in the mark upon construction (when using Performance.measure.
ReadonlydurationThe read-only duration property returns a DOMHighResTimeStamp that is the duration of the PerformanceEntry.
ReadonlyentryThe read-only entryType property returns a string representing the type of performance metric that this entry represents.
ReadonlynameThe read-only name property of the PerformanceEntry interface is a string representing the name for a performance entry.
ReadonlystartThe read-only startTime property returns the first DOMHighResTimeStamp recorded for this PerformanceEntry.
PerformanceMeasureis an abstract interface for PerformanceEntry objects with an PerformanceEntry.entryType of'measure'.MDN Reference