iOS app slows down or crashes when not matching

[AegerBorder]

Hi,

I'm using FuzzyMatchingSwift for a while now and in general it works really nice. I've experienced two things I wanted to share. Maybe I've been using it wrong but here's the issue:

I've integrated an SQLite Database into my iOS project. It's a movie quiz where the user has to guess the name of a movie and type it in a text field. Then the code scans the "fuzzyness" from the answer and executes an action. Here's my code:

let precission = self.guess.text?.confidenceScore(movieName)
            
            if precission! <= 0.25 {
                self.result.text = "You're right! It was \(movieName)"
      } else {
                self.result.text = "No, that's not the one. Try again!"
}

Sometimes when the "no" answer is triggered the app seems to be freezing for 2-3 seconds before the result is displayed. Sometimes even the whole app crashes.

Edit:
I tested a change and it seems that the crashes are gone but the reaction is still slow. Could it be possible that the following changes prevent the app from crashing?

let precission = Double((self.guess.text?.confidenceScore(movieName))!) //changed to Double
           
          if precission <= 0.25 {                   //deleted unwrap "!"
                self.result.text = "You're right! It was \(movieName)"
      } else {
                self.result.text = "No, that's not the one. Try again!"
}

Do you have an idea how I could improve my code here?

Thanks and regards, have a great holiday season
Patrick