How fast is my site? integrate boomerang and google analytics

measurePageloadTimes.js

<script type="text/javascript">
    BOOMR.init({
        beacon_url: "/boomerang.gif",
        BW: {
            enabled: false
        }
    });

    BOOMR.subscribe('before_beacon', trackInAnalytics);
    var pageTitle = document.title; // customize this
    function trackInAnalytics(beacon) {
        try {
            if (!beacon.t_done || beacon.t_done < 0) return;
            var timeTaken = beacon.t_done;
            _gaq.push(['_trackEvent', pageTitle + 'PageLoad', getBucket(timeTaken), timeTaken]);
        } catch (e) {}
    }

    function getBucket(timeTaken) {
        var bucketString;
        var bucket = [1000, 1500, 2000, 2500, 3000, 3500, 4000, 4500, 5000, 5500, 6000, 6500, 7000, 7500, 8000, 9000, 10000, 15000, 20000, 30000, 45000, 60000];
        for (var b = 0; b < bucket.length; b++) {
            if (timeTaken < bucket[b]) {
                bucketString = '< ' + bucket[b] / 1000 + 's';
                break;
            }
        }
        if (!bucketString) bucketString = '> ' + bucket[bucket.length - 1] / 1000 + 's';
        return bucketString;
    }
</script>