Easy rate limiting perfect for live search or autocomplete. The first call starts a timer, subsequent calls cancel the previous closure and starts a new timer.

import Slow

let slow = Slow(interval: 0.25)

// you can now call slow.run as much as you 
for i in 0...5 {
    slow.run {
        print("\(i)")
    }
}

// only the final print (5) will run.

You can also init with a specific dispatch queue if you'd like your closures to run on that queue. Slow defaults to the main queue.

let slow = Slow(interval: 0.25, queue: dispatch_get_main_queue())

Add Later to your Package.swift file:

import PackageDescription

let package = Package(
    name: "YourPackageName",
    dependencies: [
        .Package(url: "https://github.com/coryalder/Slow.git", majorVersion: 0),
    ]
)