Permanent solution to slow open/save dialog? I've experienced the fairly common slow open and save dialog box issue that seemed to come about with Mavericks and stick right through Yosemite.

The following solution has worked temporarily for me:

1) In Terminal: rm ~/Library/Caches/CloudKit/CloudKitMetadata*;killall cloudd

2) In Activity Monitor: Force Quit cloudd

But the problem always returns. I wanted to share the above temporary solution, but also to see if anyone has come upon a permanent solution yet.
I do not believe there is a permanent solution, since this problem has been out for far too long with little interest to fix it. I would recommend having that terminal script save as a .command stored in your dock that you would click every time you need it. To create a document that can do this for you:


Open TextEdit.app
Enter the following code into the document:

rm ~/Library/Caches/CloudKit/CloudKitMetadata*;killall cloudd
Save to a directory with the name "[a name that you would like].command"
Open Terminal
Type in chmod a+x BUT DO NOT HIT ENTER
Drag in the .command
Hit enter


Now you can drag in the command to your dock and click it whenever you need

EDIT:

Another idea is to use Automator. 


Open up Automator
Go to the toolbar on the left and drag a execute she'll script 
Paste the code from above into the action
Record a "Watch me Do" (by pressing the red record button in the top right) of:


Opening activity monitor
Seraching for cloudd
Clicking cloudd
Clicking quit
Selecting quit or force quit


Set that to 1000x and save as an app