I was wondering which way would be better if I were making a simple application with a table view in it. Cocoa bindings seem much simpler but it meet take up more CPU or RAM, which is why I'm asking the experts for some opinions about the 2 ways. Thanks.
Bindings.
Why manage it all yourself and worry about performance without profiling?
Machines are pretty fast these days, and worrying about whether there is an unacceptable overhead with using Bindings in a simple application (as you call it) is just being silly.