performSegueWithIdentifier very slow when segue is modal

Question

I have a simple table view where I handle the select action on the table view. This action follows a segue.

If the segue is a push segue, the next view

Answer 1

For developers organizing their code through subclassing, I've come to quite simple a solution I'd like to share (Swift 4):

import UIKit

class ABCViewController: UIViewController {

  // ... Other useful methods like overriding deinit and didReceiveMemoryWarning

  // Performs a segue on the main thread to ensure it will 
  // transition once a UI-slot is available
  func performSegueOnMainThread(with identifier: String, sender: Any?) {
    DispatchQueue.main.async {
      self.performSegue(with: identifier, sender: sender)
    }
  }
}

Then, simply call it from your implementation:

myViewController.performSegueOnMainThread(with: "ShowDetailsSegue", sender: self)