storyboard.instantiateViewController executes for about 3 seconds - ios

Question

I noticed that my app has a delay before presenting UIViewController, so I used print() to find out which line of code causing it and found up that let navigationVC = storyboard!.instantiateViewController(withIdentifier: "filterNavigationVC") as! UINavigationController executes for about 2 seconds. Why might it be like that? I've tried to remove everything except this one without even navigating and still it took that long.
#IBAction func filter(_ sender: AnyObject) {
let navigationVC = storyboard!.instantiateViewController(withIdentifier: "filterNavigationVC") as! UINavigationController
let destinationVC = navigationVC.topViewController as! FilterViewController
navigationVC.modalPresentationStyle = .overCurrentContext
destinationVC.backgroundColorValue = self.view.backgroundColor!
destinationVC.color = themeColor.light
destinationVC.delegate = self
destinationVC.billModel = self.price
destinationVC.applyedFilter = self.applyedFilter
self.present(navigationVC, animated: true, completion: nil)
}
Next UIViewController's viewDidLoad()
override func viewDidLoad() {
super.viewDidLoad()
customization()
}
fileprivate func customization(){
setupBillButtons(billModel.range["low"]!, medium: self.billModel.range["medium"]!, high: self.billModel.range["high"]!)
tempConfigButtons([self.lowBillButton, self.mediumBillButton, self.highBillButton])
if color == themeColor.light {
customizeLightTheme()
} else if color == themeColor.dark {
customizeDarkTheme()
}
setCharacterSpacingForLabels([typeLabel, kitchenLabel, avarageBill, metroLabel, tagsLabel], spacing: 2.79)
setSeparatorInsets([kitchenTableView, metroTableView, typeTableView], edge: UIEdgeInsetsMake(0, 20, 0, 20))
backgroundVoew.backgroundColor = backgroundColorValue
backgroundVoew.addBackroundBlur()
self.navigationController?.navigationBar.isHidden = true
}
fileprivate func customizeDarkTheme() {
comfirmButton.setImage(UIImage(named: "comfirmLight"), for: UIControlState())
dismissButton.setImage(UIImage(named: "closeLight"), for: UIControlState())
setColorsForTableViews([kitchenTableView, metroTableView, typeTableView], separatorColor: colorWithAlpha(whiteColor, alpha: 0.05), tintColor: colorWithAlpha(whiteColor, alpha: 0.5))
setColorForLabels([kitchenLabel, avarageBill, metroLabel, typeLabel, tagsLabel], color: colorWithAlpha(whiteColor, alpha: 0.50))
topName.textColor = whiteColor
UIApplication.shared.statusBarStyle = UIStatusBarStyle.lightContent
self.view.backgroundColor = backgroundColorValue
bottomComfitmButton.tintColor = whiteColor
bottomComfitmButton.backgroundColor = colorWithAlpha(whiteColor, alpha: 0.15)
showAllTags.titleLabel!.addCharactersSpacing(-0.39, text: (self.showAllTags.titleLabel?.text)!)
showAllTags.setTitleColor(colorWithAlpha(whiteColor, alpha: 0.5), for: UIControlState())
showAllFilterImage.image = UIImage(named: "filterShowAllDark")
}
fileprivate func customizeLightTheme() {
comfirmButton.setImage(UIImage(named: "comfirmDark"), for: UIControlState())
dismissButton.setImage(UIImage(named: "closeDark"), for: UIControlState())
setColorForLabels([kitchenLabel, avarageBill, metroLabel, typeLabel, tagsLabel], color: colorWithAlpha(grayColor, alpha: 0.50))
topName.textColor = grayColor
setColorsForTableViews([kitchenTableView, metroTableView, typeTableView], separatorColor: colorWithAlpha(grayColor, alpha: 0.1), tintColor: colorWithAlpha(grayColor, alpha: 0.59))
UIApplication.shared.statusBarStyle = UIStatusBarStyle.default
bottomComfitmButton.tintColor = grayColor
bottomComfitmButton.backgroundColor = colorWithAlpha(whiteColor, alpha: 0.25)
showAllTags.titleLabel!.addCharactersSpacing(-0.39, text: (self.showAllTags.titleLabel?.text)!)
showAllTags.setTitleColor(colorWithAlpha(grayColor, alpha: 0.5), for: UIControlState())
showAllFilterImage.image = UIImage(named: "filterShowAllLight")
}
fileprivate func setupBillButtons(_ low: Bool, medium: Bool, high: Bool) {
lowBillButton.isSelected = low
mediumBillButton.isSelected = medium
highBillButton.isSelected = high
}
fileprivate func setSeparatorInsets(_ tableViews: [UITableView], edge: UIEdgeInsets) {
for tableView in tableViews {
tableView.separatorInset = edge
}
}
fileprivate func tempConfigButtons(_ buttons: [UIButton]) {
for button in buttons {
button.setTitleColor(whiteColor, for: .selected)
if self.color == themeColor.dark {
button.setBackgroundColor(colorWithAlpha(whiteColor, alpha: 0.50), forState: .selected)
button.setTitleColor(whiteColor, for: UIControlState())
DispatchQueue.main.async(execute: {
button.roundCorners([.topLeft, .topRight, .bottomLeft, .bottomRight], radius: 15, borderColor: self.colorWithAlpha(self.whiteColor, alpha: 0.50), borderWidth: 1)
})
} else {
button.setTitleColor(grayColor, for: UIControlState())
button.setBackgroundColor(colorWithAlpha(grayColor, alpha: 0.50), forState: .selected)
DispatchQueue.main.async(execute: {
button.roundCorners([.topLeft, .topRight, .bottomLeft, .bottomRight], radius: 15, borderColor: self.grayColor, borderWidth: 1)
})
}
}
}