gistfile1.txt

var oldDestroy = Blaze.DOMRange._destroy;
var counter, domTimeout, startTime, endTime;

Blaze.DOMRange._destroy = function () {
    //I love monkey-patching
    if(monitorBlaze) {
        endTime = new Date().getTime();

        if(domTimeout) {
            Meteor.clearTimeout(domTimeout);

        } else {
            counter = 0;
            console.log('Blaze voodoo magic commences');
            startTime = new Date().getTime();
        }

        domTimeout = Meteor.setTimeout(function () {
            console.log('Blaze magic finishes with: ' + counter + ' destroys' + ' done in ' + (endTime - startTime) + 'ms' );
            monitorBlaze = false;
            domTimeout = null;
        }, 1000);

        counter++;
    }
};