ios – Inserting a brand new object into my mannequin context is obstructing my major thread. keep away from lags?

I am engaged on my first iOS app. I’ve a button that when pressed, adjustments a state variable, which in flip causes a block of code to execute in a background thread. This code ends in creating a brand new object that then will get saved into persistent reminiscence by inserting into my modelContext by way of modelContext.insert(myObject)

I’ve observed that there is a noticeable UI lag after I press this button. After plenty of testing and debugging, I’ve found that modelContext.insert(myObject) is the bottleneck. If I omit this one line of code and preserve all the pieces else as is, my button works nice and there may be 0 lag. As quickly as I add this line of code again in, I discover vital lag

What is going on on and the way can I take away my UI lag whereas nonetheless additionally storing my newly created object into persistent reminiscence?

I attempted shifting modelContext.insert(myObject) to varied elements of my code, however irrespective of the place I place it, the minute this will get executed my UI freezes for 0.5-1s till it finishes. I do not need my UI to freeze

That is my triggering button. “amount” here’s a @Binding variable coming from my mother or father view

         Button(motion: {
                    amount += 1
                    UIImpactFeedbackGenerator(fashion: .medium).impactOccurred()
                }) {
                    Picture(systemName: "plus.circle.fill")
                        .font(.largeTitle)
                }
                .padding(.trailing)
                
            }
            .body(maxWidth: .infinity)
            .background(Colour.grey.opacity(0.2))
            .cornerRadius(10)

Inside my mother or father view, “amount” is a @State variable. A change on this variable triggers the next code

.onChange(of: amount) { oldValue, newValue in
   
   // if didCardVariantChange is true, reset variable after which do nothing
   guard !didCardVariantChange else { 
         didCardVariantChange = false
          return
      }
      didCardVariantChange = false // reset variable
           
       workItem?.cancel() // Cancel earlier work if any
       let cardID = viewSetCardData.card_ids[indexVar]
       workItem = DispatchWorkItem {
                    
       let isCardInCollection = Assortment.accommodates(the place: { $0.card_id == cardID })
                    
        // Add or replace the cardboard in assortment as mandatory
        DispatchQueue.international(qos: .background).async {
        
        if newValue > 0 && !isCardInCollection {
  memory_operations.shared.addNewCardToCollection(cardIDToAdd: cardID,
                                                  selectedCategory: selectedCardCategory,
                                                  selectedVariant: selectedCardVariant,
                                                  amount: newValue,
                                                  modelContext: modelContext,
                                                  cardsArray: allCards)
            }
                }

                DispatchQueue.major.asyncAfter(deadline: .now() + 0.5, execute: workItem!)

The next is the perform for memory_operations.shared.addNewCardToCollection referenced above

    func addNewCardToCollection(cardIDToAdd: String, selectedCategory: String, selectedVariant: String = "Main Variant", amount: Int, pricePaid: Double? = nil, modelContext: ModelContext, cardsArray: [CardData]) {
        
    
        var allVariantsList: [String?] = []
        for card in cardsArray the place card.id == cardIDToAdd {
            allVariantsList = card.allVariants
        }
        
        let newCard = CardsOwned(card_id: cardIDToAdd, allVariants: allVariantsList)
        newCard.addQuantity_v2(amount, selectedCategory: selectedCategory, selectedVariant: selectedVariant, unitPrice: pricePaid)
        
        
        
        DispatchQueue.major.async {
            modelContext.insert(newCard) //Challenge happens at this line. Eradicating this line leads to no UI freezing or lag. Including this line again in, leads to a noticeable lag underneath the identical circumstances
            attempt? modelContext.save()
        }

    }