Peroformance Issue about Saving Widget References in Game Instance

Hello guys, just curious about an issue.

Due to some special conditions, I am trying to save multiple widgets as references inside a gameinstance with event init nodes connected. My concern is that will it cause trouble like performance issue, if i create multiple widget refs(10 or 15) in this way?

If there is better way to do the similar function, please give me some suggestion, Thank you guys.