Image in LazyVStack using massive memory

Question

I make a simple app for displaying image list. I use a LazyVStack inside ScrollView as container, ForEach to load every image Images are loading from network, I have tried AsyncImage, but AsyncImage always loads image from network and no cache. I have tried using SDWebImageSwiftUI and CachedAsyncImageView, both of them can get image from network with cache, and using lots of memory while scroll image. here is the code

import CachedAsyncImage
import SDWebImageSwiftUI
struct ContentView: View {
    @State private var imageURLList: [String] = []
    var body: some View {
        GeometryReader { geometryProxy in
            VStack {
                HStack{
                    Button("test load") {
                        // parse the image list
                        Task{
                            do{
                                self.imageURLList = try await ImageListLoader.parseImageUrlList()
                            } catch {
                                print("error:\(error)")
                            }
                        }
                    }
                    Spacer()
                    Button("clear") {
                        self.imageURLList.removeAll()
                    }
                }
                ScrollView {
                    LazyVStack(spacing: 0) {
                        ForEach(self.imageURLList, id: \.self) { url in
                            WebImage(url: URL(string: url))
                                .resizable()
                                .scaledToFit()
                                .frame(width: geometryProxy.size.width)
                        }
                    }
                }
            }
        }
        .padding()
    }
}

I have tried to same url in forEach, and no memery issue

ScrollView {
    LazyVStack(spacing: 0) {
        ForEach(self.imageURLList, id: \.self) { url in
            WebImage(url: URL(string: url))
                .resizable()
                .scaledToFit()
                .frame(width: geometryProxy.size.width)
        }
    }
}

Answer 1

Use List instead of LazyVStack this will manage the memory automatically as it works like UITableView in the UIKit. In LazyVStack it will load the images at the same time as you scroll down & keep it in the memory for the duration.