PerformanceEventTiming
interface PerformanceEventTiming extends PerformanceEntry {
readonly cancelable: boolean;
readonly processingEnd: DOMHighResTimeStamp;
readonly processingStart: DOMHighResTimeStamp;
readonly target: Node | null;
toJSON(): any;
}var PerformanceEventTiming: {
prototype: PerformanceEventTiming;
new (): PerformanceEventTiming;
};