code: function printHelp() {
  
      console.log( "Usage:" );
      console.log( "" );
      console.log( "  node tools/benchmark [options]" );
      console.log( "" );
      console.log( "Options:" );
      console.log( "  -n, --run-count <n>     number of runs (default: 10)" );
      console.log( "      --cache             make tested parsers cache results" );
      console.log( "  -o, --optimize <goal>   select optimization for speed or size (default: speed)" );
  
  }
docs: Helpers