I experience slow loading of thumbnails if T10.
I click on a folder, and after about a 1 second delay, the thumbs start displaying at about 10 per second ... Thumbs 7 was fairly instant to first image to display a and then the rest of the process went at about 30-40 thumbs displayed per second.
Also, If I wait and wait and wait, without scrolling, while what I think is population of the display array is happening,T10 ONLY populates/displays the first screen of thumbs that will fit in my window. When, thinking that OK all the background populating has happened, I scroll down with the wheel, I get no joy - there is blank space at the bottom of the thumbs window, and only then does the display start apparently building the display of those next images in the folder. ARRRGGGG

Now, here is where it gets even more interesting .. AFTER doing the scroll/ wait/ display, and then scroll/ wait/ display to the end of the folder of images, the mouse scroll back and forward IS speedy and instant like it was in T7.
If I then click out to another folder, I go thru the same frustrating process of a waited display, and then when when click back into the original folder, T10 still has the wait/scroll wait/display/scroll/wait display lag.

Whats up? Am I missing a setting. Do others have this behavior??
I have run T7 of the same win 10 machine and the loading and scrolling up and down is super fast .

I have tried this with the thumbnails contained in the database, and also with a database having images contained in folders.