docs: @Benchmark
    @BenchmarkMode(Mode.AverageTime)
    @OutputTimeUnit(TimeUnit.NANOSECONDS)
    public Span addLink(Data data) {
      Span span = data.linkSpan;
      for (int i = 0; i < data.size; i++) {
        span.addLink(data.links[i]);
      }
      return span;
    }