Function measure

src/measure-performance.ts:30–38

* Adds a performance measurement with the specified name. * * @param measureName The name of the performance measurement. * @param startMarkName The name of the starting mark * @param endMarkName The name of the ending mark

(measureName: string, startMarkName: string, endMarkName: string)

 * @param endMarkName The name of the ending mark
 */
function measure(measureName: string, startMarkName: string, endMarkName: string) {
    if (enabled) {
        const end = marks.get(endMarkName) ?? timestamp();
        const start = marks.get(startMarkName) ?? performance.timeOrigin;
        const previousDuration = durations.get(measureName) ?? 0;
        durations.set(measureName, previousDuration + (end - start));
        performance.measure(measureName, startMarkName, endMarkName);
    }
}

/**
 * Starts a performance measurement section.