XYplorer 15.90 has been released on 02-Nov-2015. Here’s a quick introduction to the main new features:
Thumbnails Speed. New "High Speed" mode generates thumbnails 3 to 5 times faster than before.
Not much to show or explain here. Just select "High Speed" in Configuration | Thumbnails | Quality and enjoy. Just one thing: Vista or later is needed to get the new speed.
To give you something colorful to look at, here is a picture wall done with XYplorer's thumbnails view (small thumbnails size, no caption, zoom to fill, padding 1 pixel):