经常更新xml文件的最佳方法是什么？

Question

I work on a small 3D voyel game like minecraft style. In my game you can remove and add some cube. Because of that i always need update/save my XML file. All the world is save in a xml file . Everything work about add/remove node in my xml file , but the problem is about the performance !

Each time i need save in the xml file , the program need sleep for 1 seconde . This is really ugly in my game .. each time the player add a cube mean wait 1 seconde for save into my xml file.

Do you have some idea ?

Here is the way i save my xml file

Example (after remove a cube)

            XElement elementToRemove = elements
              .FirstOrDefault(
              x => (string)x.Attribute("min") == buildMin.ToString() &&
                    (string)x.Attribute("max") == buildMax.ToString());

            if(elementToRemove != null)
            {
                elementToRemove.Remove();
            }
            //Xdocument Class ~ call this function need 1 seconde
            XDocumentWorld.Save(AppDomain.CurrentDomain.BaseDirectory + @"World\world.xml");

Answer 1

Honestly, you shouldn't be saving your XML every update. This is classed as bad code itself and therefore I wouldn't advise on using it. You should rather, instead, keep the information in memory and write on exit.

However, if you insist, you could in theory use another thread and schedule the code to write to the XML file every say 5 seconds reducing the load on the main thread and still keeping the functionality that you are requesting.

Have a look at the link below if you're unsure on how to use threads:

http://www.albahari.com/threading/

Answer 2

You don't have to save world state after each edit. Save the data before exiting the game or when a chunk (ie, a region) is going to be removed from memory. Also, you can store just the list of player actions instead of all the blocks. To resume you regenerate everything using the same seed (assuming a random world) and then redo those actions.