code: function startTracer() {
    if (!moduleRef) {
      for (var i in window) {
        if ([ 'top', 'document', 'window', 'worker', 'parent', 'frames', 'self', 'performance', 'navigator' ].indexOf(i) === -1) {
          processModules({ exports: window[i], filename: i });
        }
      }
    } else {
      processModules(parentModule);
    }
    active = true;
    measureTracerOverhead();
  }
docs: Start the tracer :)