title: Flutter - What are the cons of using setState() many times in the app?
body: <p>Does anyone can explain me what are the consequences, cons, of using setState() a lot of times in the app?</p>
  
  <p>I know that every time I call setState() the screen is rebuilded, but those widget that was already built, will they still be in the memory? how does it work? </p>
  
  <p>Using setState isn't good when talking about performance? </p>