jaredkhan

/// A few demonstrations of the copy-on-write behaviour of containers in the Swift Standard Library.
/// https://jaredkhan.com/blog/swift-copy-on-write

/// Pause execution so that we can look at memory usage in Activity Monitor or similar.
func pause(expectedMemoryUsage: Int) {
  print("Expecting memory usage of about \(expectedMemoryUsage)MB. Press [enter] to continue")
  let _ = readLine()
}

/// Demonstrate the copy-on-write behaviour of a large array.

jaredkhan

struct ImageHero: Nodeable {
  let background: BackgroundType
  let imagePath: String
  let alternateText: String
  
  var node: Node {
    return El.Div[
      Attr.className => "ImageHero",
      Attr.style => background.style
    ].containing(