# User Timing IDL tests

    interface Performance {
    };

    interface PerformanceEntry {
    };

    partial interface Performance {
        void mark(DOMString markName);
        void clearMarks(optional  DOMString markName);

        void measure(DOMString measureName, optional DOMString startMark, optional DOMString endMark);
        void clearMeasures(optional DOMString measureName);
    };

    interface PerformanceMark : PerformanceEntry {
    };

    interface PerformanceMeasure : PerformanceEntry {
    };