Today I noticed that a user's page shows a lot of user icons scaled from the very biggest ones. E.g. rene's icon original size is 652'832 bytes, but actually it's scaled from 512 pixels × 512 pixels to 48 pixels × 48 pixels on the page.
Total page size is about 4 MB and gtmetrix.com does not show a good page speed score for it.
Is it possible to resize user icons on the server side before they are received by the client browser?