     CheckResults(dict.count == size)
 
     var swapped = false
-    for _ in 1...10000*N {
+    for _ in 1...250*N {
         let b1 = Box(25)
         let b2 = Box(75)
         (dict[b1], dict[b2]) = (dict[b2]!, dict[b1]!)

  CheckResults(dict.count == size)

  var swapped = false
  for _ in 1...10000*N {
    let b25 = Box(25)
    let b75 = Box(75)
    let i25 = dict.index(forKey: b25)!

    CheckResults(dict.count == size)

    var swapped = false
    for _ in 1...2500*N {
        (dict[25], dict[75]) = (dict[75]!, dict[25]!)
        swapped = !swapped
        if !swappedCorrectly(swapped, dict[25]!, dict[75]!) {
