I think it's especially the seeking/processing time, it has to decide which random image to show out of +2 (in some cases +10 images for one image category, hoarders habit lol) versions of one image category, taking into account I use an image intensive theme which loads more than 10 image categories, the video, marquee screen and all other data, I am pushing it to extremes, the less seeking/thinking it has to do the faster it goes apparently, man I was used to the slower Mame list after months and now it feels like a fresh new system all in all ?