code: function bench(callback){
    conn.connect(function(err, keyspace){
      if(err){
        throw(err);
      }
  
      console.time('Helenus ' + times + ' writes');
      
      function cb(err, results){
        if(err){
          console.log('Error encountered at: ' + completed);
          throw(err);
        }
        completed += 1;
        
        if(completed === times){
          console.timeEnd('Helenus ' + times + ' writes')  ;
          conn.close();
          callback();
        }
      }
      
      /**
       * lets run a test for writes
       */
      for(; i < times; i += 1){
        vals = ['Column'+i, i.toString(16), (i % 100).toString(16)];
        conn.cql(cqlInsert, vals, { gzip:true }, cb);
      }
    }); 
  }
docs: First bench helenus