XnView Software

I have a directory containing about 6900 jpeg files and 13 sub-folders, Nothing else. The software hangs on Mac, not on Windows.

The software hangs.

Hello,
I wonder why it is so difficult for me to browse directory on my Synolgy (using the SMB protocol) with a large amount of files on my Mac with XNView MP ?
Doing the same thing on the same directory on my Synology with the Windows version is faster enough to see something on my screen quickly ...