TileMap with qml element Image

[Matahari]

Hi,

I'm thinking about TileMap in pure qml. I know how to draw one tile @Item{
width:tilewith
height:tileheight
x:idxwidth
y:idxheight
clip:true
Image{
source:sometileset
}
}@

Now to show the entire map, I need to put the above code into a repeater and a grid. But I'm wondering what about performance. I know images are cached so they should be loaded just ones (is it true ?) but what about the clip property I have heard there are some performance issue with this property? Is there any other way of doing such thing ? Like playing with sourceSize of the image?

thanks for reading me.