@Override
  public NioServer getNioServer() {
    return new PerfNioServer(perfConfig, perfNioServerMetrics, requestHandler);
  }
Returns a new instance of {@link PerfNioServer}.
@return a new instance of {@link PerfNioServer}.
ambry-tools/src/main/java/com/github/ambry/tools/perf/rest/PerfNioServerFactory.java