Too large String Array which created from DB

I have Items data, stored in DB MySQL. There are near 600 rows. To load this data into my game i use following algorithm:

Firstly i create an array wich contains all the items and one it's string look's like: "id"->"name"->"reqLevel" .... and so on

     public string[] allItemDataStr;
 
     public IEnumerator GetItemData(string link)
     {
         used = true;
         allDataLoaded = false;
         WWW data1 = new WWW(link);
         yield return data1;
 
         allItemDataStr = data1.text.Split(new string[] { "</>" }, StringSplitOptions.None);
         if (data1.error != null)
         {
             print("There was an error getting the high score: " + data1.error);
         }
 
         allDataLoaded = true;
     }

 //PHP PART
 
 <?php
     // Send variables for the MySQL database class.
     $database = mysql_connect('localhost', 'login', 'pass') or die('Could not connect: ' . mysql_error());
     mysql_select_db('unity') or die('Could not select database');
  
     $query = "SELECT * FROM `item` WHERE id != ''";
     $result = mysql_query($query) or die('Query failed: ' . mysql_error());
  
     $num_results = mysql_num_rows($result);  
  
     for($i = 0; $i < $num_results; $i++)
     {
          $row = mysql_fetch_array($result);         
          echo $row['id'] . "->" . $row['name'] . "->" . $row['description'] . "->" . $row['type'] . "->" . $row['reqLevel'] . "->" . $row['reqBbSkill'] . "->" . $row['reqRangeSkill'] . "->" . $row['reqShieldSkill'] . "->"  . $row['reqMageSkill'] . "->" . $row['reqLaunchSkill'] . "->" . $row['reqRace'] . "->". $row['damageMin'] . "->" .$row['damageMax']  . "->". $row['forceDamageMin'] . "->". $row['forceDamageMax'] . "->". $row['defRate'] . "->". $row['upgrade'] . "->" . $row['tradable'] . "->" . $row['buyPrice'] . "->" . $row['sellPrice'] . "->" . $row['catchType'] . "->" . $row['specialEffect']. "->" . $row['stackCount'] . "->" . $row['prefabName'] . "->" . $row['equipmentType'] . "->" . $row['worldPosX'] . "->" . $row['worldPosY'] . "->" . $row['worldPosZ'] . "</>";
     }
 ?>

And then i have methods that return each data of item, sent in parametr

     public string[] ExcelentItemData(string id)
     {
         for (int i = 0; i < allItemDataStr.Length; i++)
         {
             if (id == allItemDataStr[i].Split(new string[] { "->" }, StringSplitOptions.None)[0]) 
             {
                 return StringConvertings.UTF8ToCP1251(allItemDataStr[i]).Split(new string[] { "->" }, StringSplitOptions.None);
             }
 
             else
             {
                 continue;
             }
         }
 
         return new string[] { "error, error" };
     }

SO this array (allItemDataStr[], which contains all item data) causes a lot of FPS-reduction.. So give me advice please what can i do with this array?

Hope for ur answers. Thanx in advance.