} else {
	group.sumpos += stack.Value;
      }
      group.self += (place.Pos == stack.Sources.length-1) ? stack.Value : 0;
      group.places.push(place);
    }

    // Order by decreasing cost (makes it easier to spot heavy functions).
    // Though alphabetical ordering is a potential alternative that will make
    // profile comparisons easier.
    groups.sort(function(a, b) {