Did anyone else notice that lately mame's new UI has become really slow when browsing games, if it is set up to show screenshots? In my case I have a 1.4GB zip file of screenshots, but I distinctly remember speed to be perfectly acceptable a few releases ago.

Slow means that, after pressing up or down I have to wait approx 3 seconds before the previous/next game is selected. As said, previously selection would change instantly (and the displayed image with it).
When I comment out the snapshot path in the ini file no screenshot is displayed in the UI, and selection is quick as expected.

I am on Mac OS X 10.11.6 with mame 0.177 compiled from source