If you have a contacts page that is loading slow, here are a few tips that may help you to speed up the system.
1. Pick a default folder other than New contacts.
To do this, Go to Contacts, click the gear wheel on next to Folders and select Set Default Folder and choose the folder you want to load first each time. This will make whatever you choose the first set of contacts that loads automatically when you open the Contacts page.
2. Choose a reasonable number of contacts to view/load at one time.
Go to Go to Contacts, click the gear wheel on the right and choose Contact Manager Settings : Number of Contacts to view. It is recommended to set this to 100 or less.
3. Keep your Contact Manager layouts simple. The more data we have to tabulate into those views the slower it is.
On folders where you have large amounts of data, consider not using custom layouts at all. Unless necessary don’t show tags on the Contact Manager grid.