[Pharo-users] is there a better way

Hello, I have now this code : https://github.com/RoelofWobben/Rijksmuseam but it seems to be slow. Can anyone help me with a way I can use a sort of cache so the page looks first at the cache if a image is there . If so, take the image from there , if not , ask the api for the url of the image. Roelof