Load application favicons without blocking the UI

functions/private/Close-WinUtilFaviconRunspacePool.ps1

@@ -0,0 +1,57 @@
+function Close-WinUtilFaviconRunspacePool {
+    <#
+        .SYNOPSIS
+            Stops favicon work and disposes its timer, operations, circuit breaker, and runspace pool.
+    #>
+    if ($null -eq $sync) {
+        return
+    }
+
+    if ($sync.FaviconCircuitBreaker) {
+        $sync.FaviconCircuitBreaker.Cancel()
+    }
+
+    if ($sync.FaviconTimer) {
+        $sync.FaviconTimer.Stop()
+        $sync.Remove("FaviconTimer")
+    }
+
+    if ($sync.ContainsKey("FaviconQueue") -and $null -ne $sync.FaviconQueue) {
+        $sync.FaviconQueue.Clear()
+        $sync.Remove("FaviconQueue")
+    }
+
+    if ($sync.FaviconOperations) {
+        foreach ($operation in @($sync.FaviconOperations.Values)) {
+            try {
+                $operation.PowerShell.Stop()
+            } catch {
+            }
+            try {
+                $operation.PowerShell.Dispose()
+            } catch {
+            }
+        }
+        $sync.FaviconOperations.Clear()
+    }
+
+    if ($sync.FaviconRunspace) {
+        try {
+            if ($sync.FaviconRunspace.RunspacePoolStateInfo.State -notin @(
+                [System.Management.Automation.Runspaces.RunspacePoolState]::Closed,
+                [System.Management.Automation.Runspaces.RunspacePoolState]::Closing,
+                [System.Management.Automation.Runspaces.RunspacePoolState]::Broken
+            )) {
+                $sync.FaviconRunspace.Close()
+            }
+        } finally {
+            $sync.FaviconRunspace.Dispose()
+            $sync.Remove("FaviconRunspace")
+        }
+    }
+
+    if ($sync.FaviconCircuitBreaker) {
+        $sync.FaviconCircuitBreaker.Dispose()
+        $sync.Remove("FaviconCircuitBreaker")
+    }
+}

functions/private/Get-WinUtilFaviconUrl.ps1

@@ -0,0 +1,19 @@
+function Get-WinUtilFaviconUrl {
+    <#
+        .SYNOPSIS
+            Builds the Google favicon service URL for an application link.
+        .PARAMETER Link
+            The application website URL whose favicon should be requested.
+    #>
+    param(
+        [Parameter(Mandatory = $true)]
+        [string]$Link
+    )
+
+    if ([string]::IsNullOrWhiteSpace($Link)) {
+        return $null
+    }
+
+    $faviconSize = 64
+    return "https://www.google.com/s2/favicons?sz=$faviconSize&domain_url=$([uri]::EscapeDataString($Link))"
+}

functions/private/Initialize-InstallAppEntry.ps1

@@ -73,15 +73,15 @@ function Initialize-InstallAppEntry {
         $fallback = New-Object Windows.Controls.TextBlock
         $fallback.Text = $app.content.TrimStart(".").Substring(0, 1).ToUpper()
         $fallback.FontWeight = "Bold"; $fallback.HorizontalAlignment = "Center"; $fallback.VerticalAlignment = "Center"
-        if ($app.link) { $fallback.Visibility = "Collapsed" }
         $fallback.SetResourceReference([Windows.Controls.TextBlock]::FontSizeProperty, "AppEntryFontSize")
         $fallback.SetResourceReference([Windows.Controls.TextBlock]::ForegroundProperty, "ToggleButtonOnColor")
         [void]$icon.Children.Add($fallback)
+        $faviconUrl = $null
         if ($app.link) {
             $logo = New-Object Windows.Controls.Image
             $logo.Stretch = [Windows.Media.Stretch]::Uniform
-            $logo.Source = "https://www.google.com/s2/favicons?sz=64&domain_url=$([uri]::EscapeDataString($app.link))"
-            $logo.Add_ImageFailed({ $this.Visibility = "Collapsed"; $this.Parent.Children[0].Visibility = "Visible" })
+            $logo.Visibility = [Windows.Visibility]::Collapsed
+            $faviconUrl = Get-WinUtilFaviconUrl -Link $app.link
             [void]$icon.Children.Add($logo)
         }
         [void]$contentPanel.Children.Add($icon)
@@ -116,5 +116,17 @@ function Initialize-InstallAppEntry {
         }
         # Add the border to the corresponding Category
         $TargetElement.Children.Add($border) | Out-Null
+        if ($faviconUrl) {
+            if ($null -eq $sync.FaviconQueue) {
+                $sync.FaviconQueue = [System.Collections.Queue]::new()
+            }
+
+            $sync.FaviconQueue.Enqueue([pscustomobject]@{
+                AppKey      = $appKey
+                Url         = $faviconUrl
+                TargetImage = $logo
+                Fallback    = $fallback
+            })
+        }
         return $checkbox
     }

functions/private/Initialize-InstallCategoryAppList.ps1

@@ -26,6 +26,7 @@ function Initialize-InstallCategoryAppList {
             $appsByCategory[$category] += $appKey
         }
         $sync.InstallAppRenderQueue = [System.Collections.Queue]::new()
+        $sync.FaviconQueue = [System.Collections.Queue]::new()
 
         foreach ($category in $($appsByCategory.Keys | Sort-Object)) {
             # Create a container for category label + apps

functions/private/Initialize-WinUtilFaviconRunspacePool.ps1

@@ -0,0 +1,40 @@
+function Initialize-WinUtilFaviconRunspacePool {
+    <#
+        .SYNOPSIS
+            Creates or returns the dedicated runspace pool used for favicon downloads.
+        .DESCRIPTION
+            Uses the machine's available logical processor count, with a minimum of one
+            worker. The pool remains dedicated to favicon downloads so this work stays
+            isolated from other WinUtil runspaces.
+    #>
+    if ($sync.FaviconRunspace -and $sync.FaviconRunspace.RunspacePoolStateInfo.State -eq [System.Management.Automation.Runspaces.RunspacePoolState]::Opened) {
+        return $sync.FaviconRunspace
+    }
+
+    if ($sync.FaviconRunspace) {
+        try {
+            if ($sync.FaviconRunspace.RunspacePoolStateInfo.State -notin @(
+                [System.Management.Automation.Runspaces.RunspacePoolState]::Closed,
+                [System.Management.Automation.Runspaces.RunspacePoolState]::Closing,
+                [System.Management.Automation.Runspaces.RunspacePoolState]::Broken
+            )) {
+                $sync.FaviconRunspace.Close()
+            }
+        } finally {
+            $sync.FaviconRunspace.Dispose()
+            $sync.Remove("FaviconRunspace")
+        }
+    }
+
+    $maxThreads = [Environment]::ProcessorCount
+    $initialSessionState = [System.Management.Automation.Runspaces.InitialSessionState]::CreateDefault()
+
+    $sync.FaviconRunspace = [runspacefactory]::CreateRunspacePool(
+        1,
+        $maxThreads,
+        $initialSessionState,
+        $Host
+    )
+    $sync.FaviconRunspace.Open()
+    return $sync.FaviconRunspace
+}