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CmdPal: fix a perf regression loading pages (#39415)

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This was especially noticable with the icons extension.

Turns out in #39051, when I was experimenting with getting AoT clean,
i accidentally called this twice. Then we actually commited that
straight up.

This PR reverts that. It also moves a similar case where we were
initializing all the tags on the UI thread. That's wrong too - we need
to fetch properties off the UI thread, then update the list on the UI
thread.

Closes nothing, I didn't file this yet.
This commit is contained in:
Mike Griese
2025-05-16 10:47:44 -05:00
committed by GitHub
parent 0e9c5a82dd
commit c9656754bd
2 changed files with 9 additions and 12 deletions
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16
src/modules/cmdpal/Microsoft.CmdPal.UI.ViewModels/ListItemViewModel.cs
View File

@@ -107,17 +107,17 @@ public partial class ListItemViewModel(IListItem model, WeakReference<IPageConte
private void UpdateTags(ITag[]? newTagsFromModel)
{
var newTags = newTagsFromModel?.Select(t =>
{
var vm = new TagViewModel(t, PageContext);
vm.InitializeProperties();
return vm;
})
.ToList() ?? [];
DoOnUiThread(
() =>
{
var newTags = newTagsFromModel?.Select(t =>
{
var vm = new TagViewModel(t, PageContext);
vm.InitializeProperties();
return vm;
})
.ToList() ?? [];
// Tags being an ObservableCollection instead of a List lead to
// many COM exception issues.
Tags = new(newTags);

5
src/modules/cmdpal/Microsoft.CmdPal.UI.ViewModels/ShellViewModel.cs
View File

@@ -4,7 +4,6 @@
using System.Runtime.InteropServices;
using System.Runtime.Versioning;
using CommunityToolkit.Common;
using CommunityToolkit.Mvvm.ComponentModel;
using CommunityToolkit.Mvvm.Input;
using CommunityToolkit.Mvvm.Messaging;
@@ -109,13 +108,11 @@ public partial class ShellViewModel(IServiceProvider _serviceProvider, TaskSched
// TODO GH #239 switch back when using the new MD text block
// _ = _queue.EnqueueAsync(() =>
_ = Task.Factory.StartNew(
async () =>
() =>
{
// bool f = await viewModel.InitializeCommand.ExecutionTask.;
// var result = viewModel.InitializeCommand.ExecutionTask.GetResultOrDefault()!;
// var result = viewModel.InitializeCommand.ExecutionTask.GetResultOrDefault<bool?>()!;
var result = await viewModel.InitializeAsync();
CurrentPage = viewModel; // result ? viewModel : null;
////LoadedState = result ? ViewModelLoadedState.Loaded : ViewModelLoadedState.Error;
},