   let s = "the quick brown 🦊 jumps over the lazy dog"[...]
   for _ in 0..<N {
     var nums = [UInt8]()
-    for _ in 0..<10_000 {
+    for _ in 0..<3_000 {
       nums += getSubstring(s).utf8
     }
   }

  let s = "the quick brown fox jumps over the lazy dog\u{00A1}"
  for _ in 0..<N {
    var nums = [UInt8]()
    for _ in 0..<10_000 {
      nums += getString(s).utf8
    }
  }

  let s = "the quick brown 🦊 jumps over the lazy dog"
  for _ in 0..<N {
    var nums = [UInt8]()
    for _ in 0..<3_000 {
      nums += getString(s).utf8
    }
  }
