interface PerformanceMeasureOptionsPropertiesoptionaldetail: anyMetadata to be included in the measure. optionalstart: string | numberTimestamp to be used as the start time or string to be used as start mark. optionalduration: numberDuration between the start and end times. optionalend: string | numberTimestamp to be used as the end time or string to be used as end mark. optionaldetail: anyMetadata to be included in the measure. optionalstart: string | numberTimestamp to be used as the start time or string to be used as start mark. optionalduration: numberDuration between the start and end times. optionalend: string | numberTimestamp to be used as the end time or string to be used as end mark.