Whether plist file decrease performance in iphone?

I have tabbar application, every tabs having viewcontroller, am getting the values from plist file in viewwillappear in each view controller. whether it will decrease performance o开发者_高级运维f the application, please suggest which one is the best

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Are you noticing any lag in the performance of your app? If so, have you profiled your app to ensure that loading the configuration from a plist file is the issue? If not, it might decrease performance a bit, but it is fast enough.

Do not optimize code that does not need to be optimized.