Running InDesign 18.104.22.168 on OS X 10.10.5.
When I click on the File menu, there is ALWAYS a 2-4 second delay, a quick beach ball spin, and then the menu opens. This only occurs on the File menu; all other menus open as expected--quickly and instantaneously. Are there any dynamic items in the File menu that need to be updated on-the-fly, from the network, etc.? Can't understand why this would occur only with the File menu. I have tried this with files open and none open at all, after a restart of system/InDesign, to no avail.
Any ideas on what is going on, what can I check?
Try going to Preferences and set the Recent files menu to 0.
Good tip. Thanks for the answer.
Ahhh, yes, there it is.
And I'll add another note: Some of the files in the Open Recent menu are on my server at work. I was working from home today and the issue became even more apparent when I was connected through my VPN, which is slower than my native work connection.