 @inline(never)
 public func run_StringBuilder(_ N: Int) {
   for _ in 1...5000*N {
-    _ = buildString()
+    _ = buildString(getString("a"))
   }
 }
 
 @inline(never)
-func addString() -> String {
-  let s = "a" + "b" + "c" + "d" + "pizza"
+func addString(_ i: String) -> String {
+  let s = i + "b" + "c" + "d" + "pizza"
   return s
 }
 
 @inline(never)
 public func run_StringAdder(_ N: Int) {
   for _ in 1...5000*N {
-    _ = addString()
+    _ = addString(getString("a"))
   }
 }
 
 @inline(never)
-func buildStringUTF16() -> String {
-  var sb = "a"
+func buildStringUTF16(_ i: String) -> String {
+  var sb = i
   for str in ["🎉","c","d","pizza"] {
     sb += str
   }

@inline(never)
public func run_StringUTF16Builder(_ N: Int) {
  for _ in 1...5000*N {
    _ = buildStringUTF16()
  }
}


@inline(never)
func buildStringLong() -> String {
  var sb = "👻"
  let long = "Swift is a multi-paradigm, compiled programming language created for iOS, OS X, watchOS, tvOS and Linux development by Apple Inc. Swift is designed to work with Apple's Cocoa and Cocoa Touch frameworks and the large body of existing Objective-C code written for Apple products. Swift is intended to be more resilient to erroneous code (\"safer\") than Objective-C and also more concise. It is built with the LLVM compiler framework included in Xcode 6 and later and uses the Objective-C runtime, which allows C, Objective-C, C++ and Swift code to run within a single program."
  sb += long
  return sb

@inline(never)
public func run_StringBuilderLong(_ N: Int) {
  for _ in 1...5000*N {
    _ = buildStringLong("👻")
  }
}

