NSTableView is very laggy while scrolling

Question

In my OS X application, which uses Core Data my table view is very laggy while scrolling and I have only about 100+ rows there...I'm using Cocoa bindings with NSArrayController to show my data in table view.

I have only one Entity with 13 attributes, but still that table view/scroll view is very laggy.

Is there some common bug / bad coding what causes that behavior? My CPU-usage is around 85% while I'm scrolling.

Anybody have any ideas why is that? I'm using Xcode 7 released version.

UPDATE:

Instruments look like this (I used it first time):

Update 2: Im using NSVisualEffectView and overriding allowsVibrancy to return true so I'm getting table views alternative row colors to be like this as in my another project Github- Debter

If I enable core animation layer for my view it helps a lot for scrolling, but my storyboard start do something weard stuff and I can't work well any UI-releated stuff anymore.

Answer 1

Without seeing the code of your UITableView delegate and data source it is pretty hard to know the exact problem.

Some bad habits are:

• Loading data from CoreData from any of the UITableViewDataSource methods or when the UITableViewCell is being rendered.
• Loading images on the main thread or loading images in the background without caching them on local storage.
• Doing complex operations (like image processing) on tableViewCellForIndexPath or other data source methods.

Some questions that might help you find the problem:

• Are you using a NSFetchedResultsController? If your data set is long (although you mention is not) it could increase performance.
• Have you checked the number of threads? If it is too high, you might want to use an NSOperationQueue to limit your background tasks.