LazyGrid LazyStack performance issue

Question

Created Jul ’20

Replies 3

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I use lazyVStack lazyGrid and ScrollView to build a Symbol Picker. But you know, there are more than 1300 symbols in Symbol Library. So I use LazyVStack and LazyVGrid.

Here is my code:

Code Block swiftScrollView {
	LazyVStack {
		VStack(alignment: .leading) {
				CategoryNameIndicator()
				LazyVGrid(columns: columns) {
						ForEach(symbolGroup.symbolsName, id: \.self) { symbol in
							SymbolPickerCell(symbol: symbol, 
															 canBeSelected: true, 
															 selectedSymbol: $symbolLibrary.selectedSymbol)
 								 .padding(15)
								 .padding(.bottom, 5)
				}
			}
			.compositingGroup() // -> I don't know if this will improve the performance. But I used.
	 	}
	}
}

My problem is: When I scroll very fast. CPU usage will goes to 100% and the performance is reeeally bad. Scrolling Animation is caton. Do you have any suggestions?

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Answer 1

wingover OP

Jul ’20

What’s your memory graph like? I’m also finding high cpu and memory use. It’s somewhat random, maybe 1 in 8 runs. Switching out the lazy stack didn’t fix it. Have looked at the grid in that app yet. So perhaps the issue is elsewhere?

0

Answer 2

LiYanan04818 OP

Jul ’20

Check out my screen recording. It's not random.

Please remove all the space below.
https:// www .notion.so/ ca0cdd1ec01241d68373f423685bf680#28b235db8d9840098b4311c505a6a6de

0

Answer 3

pitjitsu OP

Dec ’20

Same boat here! Any updates on this issue?

0