[floxy]

Interesting. This:

  let a:String = "a" as String
  let b:String = "b" as String
  let c:String = "c" as String
  let d:String = "d" as String
  let e:String = "e" as String
  let n:Int = 11 as Int
  
  print((a + b + c) + n + d + e)

...has the long timeout, while:

  let a:String = "a" as String
  let b:String = "b" as String
  let c:String = "c" as String
  let d:String = "d" as String
  let e:String = "e" as String
  let n:Int = 11 as Int
  
  print((a + b + c) as String + n + d + e)

...fails pretty much instantaneously.