As expected, the number of scenarios you have enabled affects the performance of your sites. However, it is important to note that performance is affected less by the total number of scenarios than by the number of times a particular Event type occurs across all the scenarios you have defined. For example, if you have 20 scenarios, each of which includes a Visits page element, you may notice that pages load more slowly because the site must process 20 Visits page elements whenever anyone displays a page. To improve performance, create a single scenario that contains one Visits page event followed by several actions. The following images illustrate this idea:

Consider combining these two segments into a single segment, as follows: