UIApplication+CacheKeyboard.swift

//To prevent the 4-5 seconds lags when you show the keyboard for the first time

import UIKit

extension UIApplication {
    
    func cacheKeyboard()
    {
        let textField = UITextField()
        if let window = windows.last {
            window.addSubview(textField)
            textField.becomeFirstResponder()
            textField.resignFirstResponder()
            textField.removeFromSuperview()
        }
    }
}

awesome thanks!