To improve the performance of an Aura component that is loading slowly, the developer can make the following change:
* D. Change the default for showContactInfo to "False": By setting the default value of showContactInfo to False, the component does not fetch or render the contact information by default, which can reduce the initial load time. The information can be fetched and displayed later based on user action or other triggers.
Changing the type of contactInfo to "Map" (Option A) or moving the contents of <c:contactInfo> into the component (Option B) may not necessarily improve load times. Adding a change event handler for showContactInfo (Option C) adds more processing and can potentially slow down the component if not handled efficiently.
References:
Lightning Components Performance Best Practices: Improve Performance