public void CompareDeserializationTimes()
{
// Interesting... On the first pass, the XML time is much greater than disk and memory, but on
// subsequent iterations, the xml time is actually better!
// About a quarter of that time is in instantiating the MappingDocumentParser. Uncomment th
// following line and observe how the first XML pass time changed. It went down 75% for me.
// The XmlSerializer must walk the class schema the first time only and then cache the results.
// new MappingDocumentParser();
// Unfortunately, there's not much we can do about the one-time initial performance hit if we use
// the XmlSerializer. The alternative would be to parse the Xml by walking the XML DOM manually
// but there's no guarantee this will be faster.
// I think a better idea would be to implement a caching mechanism that uses the binary
// serialization to disk and then reloads that serialized data on subsequent application runs.
for (int i = 0; i < 5; i++)
{
FileInfo tempFile = new FileInfo(Path.Combine(TestContext.CurrentContext.TestDirectory, Guid.NewGuid() + ".hbm.binary"));
// Load the embedded xml mappings (and time it)
Stopwatch stopwatch1 = Stopwatch.StartNew();
MappingDocumentAggregator aggregator = new MappingDocumentAggregator();
aggregator.Add(domainModelAssembly);
stopwatch1.Stop();
Console.WriteLine("XML: " + stopwatch1.ElapsedMilliseconds + " ms");
// write those same mappings to disk
IList <HbmMapping> mappings = aggregator.List();
BinaryFormatter formatter = new BinaryFormatter();
using (FileStream stream = tempFile.OpenWrite())
formatter.Serialize(stream, mappings);
// Load the serialized mappings from disk (and time it)
Stopwatch stopwatch2 = Stopwatch.StartNew();
using (FileStream stream = tempFile.OpenRead())
{
IList <HbmMapping> mappings2 = (IList <HbmMapping>)formatter.Deserialize(stream);
}
stopwatch2.Stop();
Console.WriteLine("Disk: " + stopwatch2.ElapsedMilliseconds + " ms");
using (MemoryStream memoryStream = new MemoryStream())
{
formatter.Serialize(memoryStream, mappings);
memoryStream.Position = 0;
Stopwatch stopwatch3 = Stopwatch.StartNew();
IList <HbmMapping> mappings3 = (IList <HbmMapping>)formatter.Deserialize(memoryStream);
stopwatch3.Stop();
Console.WriteLine("Memory: " + stopwatch3.ElapsedMilliseconds + " ms");
}
tempFile.Delete();
Console.WriteLine();
}
}
public void CanAddDomainModelAssembly()
{
MappingDocumentAggregator aggregator = new MappingDocumentAggregator();
aggregator.Add(domainModelAssembly);
IList <HbmMapping> results = aggregator.List();
Assert.IsTrue(results.Count > 0); // 54
}
public void CanSerializeAndDeserializeDomainModelAssembly()
{
MappingDocumentAggregator aggregator = new MappingDocumentAggregator();
aggregator.Add(domainModelAssembly);
IList <HbmMapping> originalList = aggregator.List();
using (MemoryStream memory = new MemoryStream())
{
BinaryFormatter formatter = new BinaryFormatter();
formatter.Serialize(memory, originalList);
memory.Position = 0;
IList <HbmMapping> newList = (IList <HbmMapping>)formatter.Deserialize(memory);
Assert.IsTrue(newList.Count == originalList.Count);
}
}
