TimeTracker

time_tracker.js

class TimeTracker {

    constructor() {
        this.timers = {};
    }

    logLoadTimes() {
        var loadTimes = chrome.loadTimes();
        console.log( `commitLoadTime .............. ${( loadTimes.commitLoadTime - loadTimes.startLoadTime ).toFixed( 2 )}s` );
        console.log( `finishDocumentLoadTime ...... ${( loadTimes.finishDocumentLoadTime - loadTimes.startLoadTime ).toFixed( 2 )}s` );
        console.log( `finishLoadTime .............. ${( loadTimes.finishLoadTime - loadTimes.startLoadTime ).toFixed( 2 )}s` );
    }

    startTimer( name ) {
        this.timers[ name ] = Date.now();
    }

    endTimer( name ) {
        let time = Date.now() - this.timers[ name ];
        console.log( `${name} ...... ${ time > 1000 ? time / 1000 : time} ${ time > 1000 ? "s" : "ms"}` );
    }

}

let tracker = new TimeTracker();

tracker.startTimer( "Foo Timer" );

setTimeout( () => tracker.endTimer( "Foo Timer" ), 500 );

// Foo Timer ...... 501 ms