private static IEntity2 DoCloneEntity(IEntity2 sourceEntity) { IEntity2 clonedEntity = null; BinaryFormatter formatter = new BinaryFormatter();

        using (MemoryStream memStream = new MemoryStream())
        {
            formatter.Serialize(memStream, sourceEntity);
            memStream.Seek(0, SeekOrigin.Begin);
            clonedEntity = (IEntity2)formatter.Deserialize(memStream);
        }

        return clonedEntity;
    }

this is my code ,It took half an hour to do it. i have13,000 rows child entity in source entity . how can i do it fast. i have set SerializationHelper.Optimization = SerializationOptimization.Fast;

Mmm, given the amount of entities I think that is kind of expected, even so it's a lot of time. You can add more speed setting to false SerializationHelper.PreserveObjectIDs.

Only this way to do this?

Please check what takes the time in your code (with a profiler, do this with 10, or 20 entities, as profiling is slower than normal execution), as half an hour for 13,000 entities is very slow. Fast serialization should serialize those 13,000 entities within a couple of seconds if not faster. Also make sure you're indeed using 13,000 entities and not many many more.

Keep in mind that serialization is recursive. So if you serialize 1 entity which can reach all of them (through references, e.g. you serialize myOrder, which references myCustomer, which references 20 other Orderentity instances, you'll serialize all of them!), you serialize them all when you think you serialize just 1 entity.

sorry ,it has 130,000 entities ,not 13,000

so ,i want to use entity.writexml method,after then readxml.

string fileName = sourceEntity.LLBLGenProEntityName + ".xml"; string entityXml = string.Empty; sourceEntity.WriteXml(out entityXml); StreamWriter streamWriter = new StreamWriter(fileName, false); streamWriter.Write(entityXml); streamWriter.Flush();

        if (streamWriter != null)
        {
            streamWriter.Close();
            streamWriter.Dispose();
        }

        StreamReader streamReader = new StreamReader(fileName);
        entityXml = streamReader.ReadToEnd();

        streamReader = new StreamReader(fileName);
        entityXml = streamReader.ReadToEnd();

        IEntity2 clonedEntity = Shared.GetEntityByName(sourceEntity.LLBLGenProEntityName);
        clonedEntity.ReadXml(entityXml);

        if (streamReader != null)
        {
            streamReader.Close();
            streamReader.Dispose();
        }

but WriteXml(out entityXml) it throw the OutOfMemoryException.

What about using a profiler with the memoryStream way? (edit) Also which runtime library version (build number) are you using?

--------->What about using a profiler with the memoryStream way?

how can i do it?

my library version is 2.6.10.421

These are 3rd party tools, like ANTS profiler.

heyu52 wrote:

--------->What about using a profiler with the memoryStream way?

how can i do it?

my library version is 2.6.10.421

Also, please read what I wrote. You didn't give any code how you call it, nor did you give information about how these 130,000 entities are stored (in a collection, in a graph, are they referencing others? etc.).

If you use xml (which is much slower), use compact25 mode.

Do you speak Chinese? I can speak a little English.

This is all my fault.

I mistook your meaning .

Does that mean we can close this thread, or do you still have an outstanding query?

Matt

please close it