* We eliminate unnecessary node creation by catching cases where old nodes can be reused
       * because their next fields won't change. Statistically, at the default threshold, only
       * about one-sixth of them need cloning when a table doubles. The nodes they replace will be
       * garbage collectable as soon as they are no longer referenced by any reader thread that may
       * be in the midst of traversing table right now.
       */

       * We eliminate unnecessary node creation by catching cases where old nodes can be reused
       * because their next fields won't change. Statistically, at the default threshold, only
       * about one-sixth of them need cloning when a table doubles. The nodes they replace will be
       * garbage collectable as soon as they are no longer referenced by any reader thread that may
       * be in the midst of traversing table right now.
       */

		// No change to stdout.
	} else {
		// If we're only running a single package under test or if parallelism is
		// set to 1, and if we're displaying all output (testShowPass), we can
		// hurry the output along, echoing it as soon as it comes in.
		// We still have to copy to &buf for caching the result. This special
		// case was introduced in Go 1.5 and is intentionally undocumented: