Changeset 3913 for trunk/sources/HeuristicLab.Persistence/3.3/Default/Xml

Timestamp:

06/09/10 16:29:02 (14 years ago)

Author:

epitzer

Message:

Accelerate persistence: (#646)

• dynamically compile field and property accessors
• enable caching of compiled field and property accessors
• delay costly custom attribute retrieval by checking signatures first
• implement custom List<double> serializer
• log deserialization time span

Location:

trunk/sources/HeuristicLab.Persistence/3.3/Default/Xml

Files:

• Compact/DoubleList2XmlSerializer.cs (modified) (1 diff)
• XmlParser.cs (modified) (1 diff)

trunk/sources/HeuristicLab.Persistence/3.3/Default/Xml/Compact/DoubleList2XmlSerializer.cs

@@ -23 +23 @@
 using System.Collections.Generic;
 using System;
+using System.Linq;
 using HeuristicLab.Persistence.Core;
 using HeuristicLab.Persistence.Default.Xml.Primitive;
+using System.Text;
 
 namespace HeuristicLab.Persistence.Default.Xml.Compact {
 
-  internal sealed class DoubleList2XmlSerializer : NumberEnumeration2XmlSerializerBase<List<double>> {
+  internal sealed class DoubleList2XmlSerializer : CompactXmlSerializerBase<List<double>> {
 
-    protected override void Add(IEnumerable enumeration, object o) {
-      ((List<double>)enumeration).Add((double)o);
+    private static readonly char[] separators = new char[] { ';' };
+
+    public override XmlString Format(List<double> list) {
+      StringBuilder sb = new StringBuilder();
+      foreach (var d in list) {
+        sb.Append(Double2XmlSerializer.FormatG17(d)).Append(';');
+      }
+      return new XmlString(sb.ToString());
     }
 
-    protected override IEnumerable Instantiate() {
-      return new List<double>();
+    public override List<double> Parse(XmlString data) {
+      try {
+        var values = data.Data.Split(separators, StringSplitOptions.RemoveEmptyEntries);
+        List<double> list = new List<double>(values.Length);
+        foreach (var value in values) {
+          list.Add(Double2XmlSerializer.ParseG17(value));
+        }
+        return list;
+      } catch (InvalidCastException e) {
+        throw new PersistenceException("Invalid element data during reconstruction of List<double>.", e);
+      } catch (OverflowException e) {
+        throw new PersistenceException("Overflow during element parsing while trying to reconstruct List<double>.", e);
+      }
     }
-
-    protected override string FormatValue(object o) {
-      return Double2XmlSerializer.FormatG17((double)o);
-    }
-
-    protected override object ParseValue(string o) {
-      return Double2XmlSerializer.ParseG17(o);
-    }
-
   }
 }

trunk/sources/HeuristicLab.Persistence/3.3/Default/Xml/XmlParser.cs

@@ -188 +188 @@
     /// <returns>A fresh object instance</returns>
     public static object Deserialize(string filename) {
-      using (ZipFile file = new ZipFile(filename)) {
-        return Deserialize(file);
+      TimeSpan start = System.Diagnostics.Process.GetCurrentProcess().TotalProcessorTime;
+      try {
+        using (ZipFile file = new ZipFile(filename)) {
+          return Deserialize(file);
+        }
+      } finally {
+        TimeSpan end = System.Diagnostics.Process.GetCurrentProcess().TotalProcessorTime;
+        Tracing.Logger.Info(string.Format(
+          "deserialization of {0} took {1} seconds",
+          filename, (end - start).TotalSeconds));
       }
     }