Measure and report Angular 2 change detection time

time.ts

        const detectChanges = changeDetector['_view']['detectChanges'];

        let detect = 0;

        let title = document.getElementsByTagName('title')[0] as HTMLTitleElement;

        changeDetector['_view']['detectChanges'] = () => {
            detect++;
            const start = getTimer();

            detectChanges.apply(changeDetector['_view']);

            let time = (getTimer() - start);

            let text = ` [${detect}] ${time.toFixed(2)} ms`;

            title.text = text;

            if(time > 25)
            {
                console.warn(text);
            }
        };