…3665)

Context: https://github.com/davidortinau/AllTheLists

Profiling @davidortinau's app, I noticed the "Check-ins" sample felt
the slowest on Android.

One thing I noticed while scrolling:

    98.75ms (0.90%) Microsoft.Maui!Microsoft.Maui.Handlers.ImageHandler.PlatformArrange(Microsoft.Maui.Graphics.Rect)
    67.11ms (0.61%) Mono.Android!Android.Widget.ImageView.ScaleType.get_CenterCrop()

In this case, `PlatformArrange()` is called a lot for every `<Image/>`:

    if (PlatformView.GetScaleType() == ImageView.ScaleType.CenterCrop)
    {
        var (left, top, right, bottom) = PlatformView.Context!.ToPixels(frame);
        var clipRect = new Android.Graphics.Rect(0, 0, right - left, bottom - top);
        PlatformView.ClipBounds = clipRect;
    }

`ImageView.ScaleType` is a class, and so and some bookkeeping is done
to lookup *the same* C# instance for a Java object. We can make this a
bit better by writing a new Java method:

    public static boolean isImageViewCenterCrop(@nonnull ImageView imageView) {
        return imageView.getScaleType() == ImageView.ScaleType.CENTER_CROP;
    }

Next, let's make a `PlatformView.ToPixels()` extension method that can
avoid calling `View.Context` for the same reason.

Lastly, we can make a `PlatformInterop.SetClipBounds()` method to avoid
creating a `Android.Graphics.Rect` object in C#.

With these changes, I can only see the topmost `PlatformArrange()`
method now:

    2.93ms (0.03%) Microsoft.Maui!Microsoft.Maui.Handlers.ImageHandler.PlatformArrange(Microsoft.Maui.Graphics.Rect)

This should improve the layout performance of all .NET MAUI `<Image/>`
on Android. I also "banned" `GetScaleType()` in `eng/BannedSymbols.txt`.

…3665)

Context: https://github.com/davidortinau/AllTheLists

Profiling @davidortinau's app, I noticed the "Check-ins" sample felt
the slowest on Android.

One thing I noticed while scrolling:

    98.75ms (0.90%) Microsoft.Maui!Microsoft.Maui.Handlers.ImageHandler.PlatformArrange(Microsoft.Maui.Graphics.Rect)
    67.11ms (0.61%) Mono.Android!Android.Widget.ImageView.ScaleType.get_CenterCrop()

In this case, `PlatformArrange()` is called a lot for every `<Image/>`:

    if (PlatformView.GetScaleType() == ImageView.ScaleType.CenterCrop)
    {
        var (left, top, right, bottom) = PlatformView.Context!.ToPixels(frame);
        var clipRect = new Android.Graphics.Rect(0, 0, right - left, bottom - top);
        PlatformView.ClipBounds = clipRect;
    }

`ImageView.ScaleType` is a class, and so and some bookkeeping is done
to lookup *the same* C# instance for a Java object. We can make this a
bit better by writing a new Java method:

    public static boolean isImageViewCenterCrop(@nonnull ImageView imageView) {
        return imageView.getScaleType() == ImageView.ScaleType.CENTER_CROP;
    }

Next, let's make a `PlatformView.ToPixels()` extension method that can
avoid calling `View.Context` for the same reason.

Lastly, we can make a `PlatformInterop.SetClipBounds()` method to avoid
creating a `Android.Graphics.Rect` object in C#.

With these changes, I can only see the topmost `PlatformArrange()`
method now:

    2.93ms (0.03%) Microsoft.Maui!Microsoft.Maui.Handlers.ImageHandler.PlatformArrange(Microsoft.Maui.Graphics.Rect)

This should improve the layout performance of all .NET MAUI `<Image/>`
on Android. I also "banned" `GetScaleType()` in `eng/BannedSymbols.txt`.

…3665)

Context: https://github.com/davidortinau/AllTheLists

Profiling @davidortinau's app, I noticed the "Check-ins" sample felt
the slowest on Android.

One thing I noticed while scrolling:

    98.75ms (0.90%) Microsoft.Maui!Microsoft.Maui.Handlers.ImageHandler.PlatformArrange(Microsoft.Maui.Graphics.Rect)
    67.11ms (0.61%) Mono.Android!Android.Widget.ImageView.ScaleType.get_CenterCrop()

In this case, `PlatformArrange()` is called a lot for every `<Image/>`:

    if (PlatformView.GetScaleType() == ImageView.ScaleType.CenterCrop)
    {
        var (left, top, right, bottom) = PlatformView.Context!.ToPixels(frame);
        var clipRect = new Android.Graphics.Rect(0, 0, right - left, bottom - top);
        PlatformView.ClipBounds = clipRect;
    }

`ImageView.ScaleType` is a class, and so and some bookkeeping is done
to lookup *the same* C# instance for a Java object. We can make this a
bit better by writing a new Java method:

    public static boolean isImageViewCenterCrop(@nonnull ImageView imageView) {
        return imageView.getScaleType() == ImageView.ScaleType.CENTER_CROP;
    }

Next, let's make a `PlatformView.ToPixels()` extension method that can
avoid calling `View.Context` for the same reason.

Lastly, we can make a `PlatformInterop.SetClipBounds()` method to avoid
creating a `Android.Graphics.Rect` object in C#.

With these changes, I can only see the topmost `PlatformArrange()`
method now:

    2.93ms (0.03%) Microsoft.Maui!Microsoft.Maui.Handlers.ImageHandler.PlatformArrange(Microsoft.Maui.Graphics.Rect)

This should improve the layout performance of all .NET MAUI `<Image/>`
on Android. I also "banned" `GetScaleType()` in `eng/BannedSymbols.txt`.

…3665)

Context: https://github.com/davidortinau/AllTheLists

Profiling @davidortinau's app, I noticed the "Check-ins" sample felt
the slowest on Android.

One thing I noticed while scrolling:

    98.75ms (0.90%) Microsoft.Maui!Microsoft.Maui.Handlers.ImageHandler.PlatformArrange(Microsoft.Maui.Graphics.Rect)
    67.11ms (0.61%) Mono.Android!Android.Widget.ImageView.ScaleType.get_CenterCrop()

In this case, `PlatformArrange()` is called a lot for every `<Image/>`:

    if (PlatformView.GetScaleType() == ImageView.ScaleType.CenterCrop)
    {
        var (left, top, right, bottom) = PlatformView.Context!.ToPixels(frame);
        var clipRect = new Android.Graphics.Rect(0, 0, right - left, bottom - top);
        PlatformView.ClipBounds = clipRect;
    }

`ImageView.ScaleType` is a class, and so and some bookkeeping is done
to lookup *the same* C# instance for a Java object. We can make this a
bit better by writing a new Java method:

    public static boolean isImageViewCenterCrop(@nonnull ImageView imageView) {
        return imageView.getScaleType() == ImageView.ScaleType.CENTER_CROP;
    }

Next, let's make a `PlatformView.ToPixels()` extension method that can
avoid calling `View.Context` for the same reason.

Lastly, we can make a `PlatformInterop.SetClipBounds()` method to avoid
creating a `Android.Graphics.Rect` object in C#.

With these changes, I can only see the topmost `PlatformArrange()`
method now:

    2.93ms (0.03%) Microsoft.Maui!Microsoft.Maui.Handlers.ImageHandler.PlatformArrange(Microsoft.Maui.Graphics.Rect)

This should improve the layout performance of all .NET MAUI `<Image/>`
on Android. I also "banned" `GetScaleType()` in `eng/BannedSymbols.txt`.

…3665)

Context: https://github.com/davidortinau/AllTheLists

Profiling @davidortinau's app, I noticed the "Check-ins" sample felt
the slowest on Android.

One thing I noticed while scrolling:

    98.75ms (0.90%) Microsoft.Maui!Microsoft.Maui.Handlers.ImageHandler.PlatformArrange(Microsoft.Maui.Graphics.Rect)
    67.11ms (0.61%) Mono.Android!Android.Widget.ImageView.ScaleType.get_CenterCrop()

In this case, `PlatformArrange()` is called a lot for every `<Image/>`:

    if (PlatformView.GetScaleType() == ImageView.ScaleType.CenterCrop)
    {
        var (left, top, right, bottom) = PlatformView.Context!.ToPixels(frame);
        var clipRect = new Android.Graphics.Rect(0, 0, right - left, bottom - top);
        PlatformView.ClipBounds = clipRect;
    }

`ImageView.ScaleType` is a class, and so and some bookkeeping is done
to lookup *the same* C# instance for a Java object. We can make this a
bit better by writing a new Java method:

    public static boolean isImageViewCenterCrop(@nonnull ImageView imageView) {
        return imageView.getScaleType() == ImageView.ScaleType.CENTER_CROP;
    }

Next, let's make a `PlatformView.ToPixels()` extension method that can
avoid calling `View.Context` for the same reason.

Lastly, we can make a `PlatformInterop.SetClipBounds()` method to avoid
creating a `Android.Graphics.Rect` object in C#.

With these changes, I can only see the topmost `PlatformArrange()`
method now:

    2.93ms (0.03%) Microsoft.Maui!Microsoft.Maui.Handlers.ImageHandler.PlatformArrange(Microsoft.Maui.Graphics.Rect)

This should improve the layout performance of all .NET MAUI `<Image/>`
on Android. I also "banned" `GetScaleType()` in `eng/BannedSymbols.txt`.

…3665)

Context: https://github.com/davidortinau/AllTheLists

Profiling @davidortinau's app, I noticed the "Check-ins" sample felt
the slowest on Android.

One thing I noticed while scrolling:

    98.75ms (0.90%) Microsoft.Maui!Microsoft.Maui.Handlers.ImageHandler.PlatformArrange(Microsoft.Maui.Graphics.Rect)
    67.11ms (0.61%) Mono.Android!Android.Widget.ImageView.ScaleType.get_CenterCrop()

In this case, `PlatformArrange()` is called a lot for every `<Image/>`:

    if (PlatformView.GetScaleType() == ImageView.ScaleType.CenterCrop)
    {
        var (left, top, right, bottom) = PlatformView.Context!.ToPixels(frame);
        var clipRect = new Android.Graphics.Rect(0, 0, right - left, bottom - top);
        PlatformView.ClipBounds = clipRect;
    }

`ImageView.ScaleType` is a class, and so and some bookkeeping is done
to lookup *the same* C# instance for a Java object. We can make this a
bit better by writing a new Java method:

    public static boolean isImageViewCenterCrop(@nonnull ImageView imageView) {
        return imageView.getScaleType() == ImageView.ScaleType.CENTER_CROP;
    }

Next, let's make a `PlatformView.ToPixels()` extension method that can
avoid calling `View.Context` for the same reason.

Lastly, we can make a `PlatformInterop.SetClipBounds()` method to avoid
creating a `Android.Graphics.Rect` object in C#.

With these changes, I can only see the topmost `PlatformArrange()`
method now:

    2.93ms (0.03%) Microsoft.Maui!Microsoft.Maui.Handlers.ImageHandler.PlatformArrange(Microsoft.Maui.Graphics.Rect)

This should improve the layout performance of all .NET MAUI `<Image/>`
on Android. I also "banned" `GetScaleType()` in `eng/BannedSymbols.txt`.