 
 @inline(never)
 public func run_StringWordBuilder(_ N: Int) {
-  _ = buildString(word: "bumfuzzle", count: 50_000 * N, reservingCapacity: false)
+  blackHole(buildString(
+    word: "bumfuzzle", count: 50_000 * N, reservingCapacity: false))
 }
 
 @inline(never)
 public func run_StringWordBuilderReservingCapacity(_ N: Int) {
-  _ = buildString(word: "bumfuzzle", count: 50_000 * N, reservingCapacity: true)
+  blackHole(buildString(
+    word: "bumfuzzle", count: 50_000 * N, reservingCapacity: true))
 }

  count: Int,
  reservingCapacity: Bool
) -> String {
  var sb = ""
  if reservingCapacity {
    sb.reserveCapacity(count * word.unicodeScalars.count)

import TestsUtils

public let StringBuilder = [
  BenchmarkInfo(
    name: "StringAdder",
    runFunction: run_StringAdder,
    tags: [.validation, .api, .String]),
  BenchmarkInfo(
    name: "StringBuilder",
    runFunction: run_StringBuilder,
    tags: [.validation, .api, .String]),
  BenchmarkInfo(
    name: "StringUTF16Builder",
    runFunction: run_StringUTF16Builder,
    tags: [.validation, .api, .String]),
  BenchmarkInfo(
    name: "StringUTF16SubstringBuilder",
    runFunction: run_StringUTF16SubstringBuilder,
    tags: [.validation, .api, .String]),
  BenchmarkInfo(
    name: "StringBuilderLong",
    runFunction: run_StringBuilderLong,
    tags: [.validation, .api, .String]),
  BenchmarkInfo(
    name: "StringBuilderWithLongSubstring",
    runFunction: run_StringBuilderWithLongSubstring,
    tags: [.validation, .api, .String]),
  BenchmarkInfo(
    name: "StringWordBuilder",
    runFunction: run_StringWordBuilder,
