PerformanceMark
open external class PerformanceMark(markName: String, markOptions: PerformanceMarkOptions = definedExternally) : PerformanceEntry(source)
PerformanceMark is an abstract interface for PerformanceEntry objects with an entryType of "mark". Entries of this type are created by calling performance.mark() to add a named DOMHighResTimeStamp (the mark) to the browser's performance timeline.