iphone Spotlight search is very slow
I frequently use an iPhone Spotlight search (swipe down from the top of the screen) to look for an app or contact on my iPhone. I find it more convenient that scrolling through screens to find the app, or opening Contacts.
This option used to work great. Spotlight would immediately find what I was looking for, and old be all set. But in recent months it has slowed down greatly, to the point where it sometimes takes 20-30 seconds to find what I'm looking for, or even doesn't find it at all.
How can I fix the problem and make Spotlight search functional again?
Thanks.
iPhone 6 Plus, iOS 10.2.1