 // can pre-reserve capacity.
 @inline(never)
 public func run_ArrayAppendStrings(_ N: Int) {
-  let other = stride(from: 0, to: 10_000, by: 1).map { "\($0)" }
+  let other: [String] = otherStrings
+
   for _ in 0..<N {
     for _ in 0..<10 {
       var nums = [String]()

// can pre-reserve capacity.
@inline(never)
public func run_ArrayAppendOptionals(_ N: Int) {
  let other: [Int?] = Array(repeating: 1, count: 10_000)

  for _ in 0..<N {
    for _ in 0..<10 {

// can pre-reserve capacity, but no optimization points used.
@inline(never)
public func run_ArrayAppendLazyMap(_ N: Int) {
  let other = array.lazy.map { $0 * 2 }

  for _ in 0..<N {
    for _ in 0..<10 {
